diff --git a/docs/images/requirements_graphs/LightRecursiveHcraft-K2-I6_requirements_graph.html b/docs/images/requirements_graphs/LightRecursiveHcraft-K2-I6_requirements_graph.html
index 4b2c07be..aa65c385 100644
--- a/docs/images/requirements_graphs/LightRecursiveHcraft-K2-I6_requirements_graph.html
+++ b/docs/images/requirements_graphs/LightRecursiveHcraft-K2-I6_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#0", "label": "0", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": NaN, "y": 0.0}, {"color": "red", "id": "item#1", "label": "1", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": NaN, "y": 160.00000000000003}, {"color": "red", "id": "item#2", "label": "2", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": NaN, "y": 320.00000000000006}, {"color": "red", "id": "item#3", "label": "3", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": NaN, "y": 480.0}, {"color": "red", "id": "item#4", "label": "4", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": NaN, "y": 640.0000000000001}, {"color": "red", "id": "item#5", "label": "5", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": NaN, "y": 800.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 1, "title": "item_required", "to": "item#1", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#4", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 5, "title": "item_required", "to": "item#5", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#3", "label": "3", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 480.0}, {"color": "red", "id": "item#4", "label": "4", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 640.0000000000001}, {"color": "red", "id": "item#5", "label": "5", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "red", "id": "item#1", "label": "1", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 160.00000000000003}, {"color": "red", "id": "item#2", "label": "2", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 320.00000000000006}, {"color": "red", "id": "item#0", "label": "0", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#4", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 1, "title": "item_required", "to": "item#1", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 2, "title": "item_required", "to": "item#2", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MineHcraft_requirements_graph.html b/docs/images/requirements_graphs/MineHcraft_requirements_graph.html
index d486c2ad..8d5aa8ae 100644
--- a/docs/images/requirements_graphs/MineHcraft_requirements_graph.html
+++ b/docs/images/requirements_graphs/MineHcraft_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#blaze_powder", "label": "blaze_powder", "level": 21, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 2150.4}, {"color": "red", "id": "item#ender_eye", "label": "ender_eye", "level": 22, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 2252.8}, {"color": "red", "id": "item#wood_shovel", "label": "wood_shovel", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 614.4}, {"color": "red", "id": "item#dirt", "label": "dirt", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 204.8}, {"color": "red", "id": "item#gravel", "label": "gravel", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 716.8000000000001}, {"color": "red", "id": "item#gold_axe", "label": "gold_axe", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 1638.4}, {"color": "red", "id": "item#wood", "label": "wood", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 204.8}, {"color": "red", "id": "item#iron_shovel", "label": "iron_shovel", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1228.8}, {"color": "red", "id": "item#iron_axe", "label": "iron_axe", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 1228.8}, {"color": "red", "id": "item#gold_pickaxe", "label": "gold_pickaxe", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1638.4}, {"color": "red", "id": "item#cobblestone", "label": "cobblestone", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 716.8000000000001}, {"color": "red", "id": "item#coal", "label": "coal", "level": 10, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1024.0000000000002}, {"color": "red", "id": "item#netherrack", "label": "netherrack", "level": 20, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 2048.0000000000005}, {"color": "red", "id": "item#ender_pearl", "label": "ender_pearl", "level": 13, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1331.2}, {"color": "red", "id": "item#wood_sword", "label": "wood_sword", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 614.4}, {"color": "red", "id": "item#leather", "label": "leather", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 716.8000000000001}, {"color": "red", "id": "item#crafting_table", "label": "crafting_table", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 409.6}, {"color": "blue", "id": "zone_item#crafting_table in zone", "label": "crafting_table in zone", "level": 5, "shape": "dot", "size": 10, "title": "zone_item", "x": 597.3333333333333, "y": 512.0000000000001}, {"color": "red", "id": "item#wood_plank", "label": "wood_plank", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 307.2}, {"color": "red", "id": "item#iron_ingot", "label": "iron_ingot", "level": 11, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1126.4}, {"color": "red", "id": "item#gold_ingot", "label": "gold_ingot", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1536.0}, {"color": "red", "id": "item#stick", "label": "stick", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 409.6}, {"color": "red", "id": "item#wood_pickaxe", "label": "wood_pickaxe", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 614.4}, {"color": "red", "id": "item#wood_axe", "label": "wood_axe", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 614.4}, {"color": "red", "id": "item#flint", "label": "flint", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 819.2}, {"color": "red", "id": "item#flint_and_steel", "label": "flint_and_steel", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1228.8}, {"color": "red", "id": "item#gold_shovel", "label": "gold_shovel", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1638.4}, {"color": "red", "id": "item#diamond", "label": "diamond", "level": 14, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1433.6000000000001}, {"color": "red", "id": "item#enchanting_table", "label": "enchanting_table", "level": 17, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1740.8000000000002}, {"color": "red", "id": "item#diamond_pickaxe", "label": "diamond_pickaxe", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1536.0}, {"color": "red", "id": "item#diamond_axe", "label": "diamond_axe", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 1536.0}, {"color": "red", "id": "item#diamond_shovel", "label": "diamond_shovel", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1536.0}, {"color": "red", "id": "item#diamond_sword", "label": "diamond_sword", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1536.0}, {"color": "blue", "id": "zone_item#enchanting_table in zone", "label": "enchanting_table in zone", "level": 18, "shape": "dot", "size": 10, "title": "zone_item", "x": 238.93333333333334, "y": 1843.1999999999998}, {"color": "red", "id": "item#book", "label": "book", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 819.2}, {"color": "red", "id": "item#stone_shovel", "label": "stone_shovel", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 819.2}, {"color": "red", "id": "item#blaze_rod", "label": "blaze_rod", "level": 20, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 2048.0000000000005}, {"color": "green", "id": "zone#underground", "label": "underground", "level": 9, "shape": "dot", "size": 10, "title": "zone", "x": 238.93333333333334, "y": 921.5999999999999}, {"color": "green", "id": "zone#bedrock", "label": "bedrock", "level": 13, "shape": "dot", "size": 10, "title": "zone", "x": 238.93333333333334, "y": 1331.2}, {"color": "red", "id": "item#iron_ore", "label": "iron_ore", "level": 10, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1024.0000000000002}, {"color": "red", "id": "item#gold_ore", "label": "gold_ore", "level": 14, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1433.6000000000001}, {"color": "red", "id": "item#obsidian", "label": "obsidian", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1638.4}, {"color": "red", "id": "item#redstone", "label": "redstone", "level": 14, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1433.6000000000001}, {"color": "red", "id": "item#iron_pickaxe", "label": "iron_pickaxe", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1228.8}, {"color": "red", "id": "item#iron_sword", "label": "iron_sword", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1228.8}, {"color": "red", "id": "item#furnace", "label": "furnace", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 819.2}, {"color": "red", "id": "item#stone_pickaxe", "label": "stone_pickaxe", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 819.2}, {"color": "red", "id": "item#stone_axe", "label": "stone_axe", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 819.2}, {"color": "red", "id": "item#stone_sword", "label": "stone_sword", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 819.2}, {"color": "red", "id": "item#gold_sword", "label": "gold_sword", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 1638.4}, {"color": "red", "id": "item#paper", "label": "paper", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 614.4}, {"color": "red", "id": "item#ender_dragon_head", "label": "ender_dragon_head", "level": 25, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 2560.0}, {"color": "red", "id": "item#clock", "label": "clock", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1638.4}, {"color": "blue", "id": "zone_item#furnace in zone", "label": "furnace in zone", "level": 9, "shape": "dot", "size": 10, "title": "zone_item", "x": 119.46666666666667, "y": 921.5999999999999}, {"color": "red", "id": "item#reeds", "label": "reeds", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 307.2}, {"color": "blue", "id": "zone_item#open_nether_portal in zone", "label": "open_nether_portal in zone", "level": 18, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 1843.1999999999998}, {"color": "blue", "id": "zone_item#open_ender_portal in zone", "label": "open_ender_portal in zone", "level": 23, "shape": "dot", "size": 10, "title": "zone_item", "x": 477.8666666666667, "y": 2355.2000000000003}, {"color": "blue", "id": "zone_item#close_nether_portal in zone", "label": "close_nether_portal in zone", "level": 17, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 1740.8000000000002}, {"color": "green", "id": "zone#end", "label": "end", "level": 24, "shape": "dot", "size": 10, "title": "zone", "x": 477.8666666666667, "y": 2457.6}, {"color": "green", "id": "zone#nether", "label": "nether", "level": 19, "shape": "dot", "size": 10, "title": "zone", "x": 477.8666666666667, "y": 1945.6000000000004}, {"color": "green", "id": "zone#forest", "label": "forest", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 102.4}, {"color": "green", "id": "zone#meadow", "label": "meadow", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 204.8}, {"color": "green", "id": "zone#swamp", "label": "swamp", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 477.8666666666667, "y": 204.8}, {"color": "green", "id": "zone#stronghold", "label": "stronghold", "level": 19, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 1945.6000000000004}, {"color": "blue", "id": "zone_item#close_ender_portal in zone", "label": "close_ender_portal in zone", "level": 20, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 2048.0000000000005}, {"color": "red", "id": "item#egg", "label": "egg", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 307.2}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 358.40000000000003, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#blaze_powder", "group": 184, "title": "item_required", "to": "item#ender_eye", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "item#wood_shovel", "group": 72, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#wood_shovel", "group": 73, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "item#wood_shovel", "group": 74, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#wood_shovel", "group": 91, "title": "item_required", "to": "item#gravel", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#gold_axe", "group": 79, "title": "item_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "item#gold_axe", "group": 80, "title": "item_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#iron_shovel", "group": 66, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#iron_shovel", "group": 67, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#iron_shovel", "group": 68, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#iron_shovel", "group": 89, "title": "item_required", "to": "item#gravel", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#iron_axe", "group": 81, "title": "item_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#iron_axe", "group": 82, "title": "item_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_pickaxe", "group": 97, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#gold_pickaxe", "group": 98, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#gold_pickaxe", "group": 99, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "item#gold_pickaxe", "group": 100, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#gold_pickaxe", "group": 101, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_pickaxe", "group": 119, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#gold_pickaxe", "group": 120, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_pickaxe", "group": 143, "title": "item_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#ender_pearl", "group": 184, "title": "item_required", "to": "item#ender_eye", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#wood_sword", "group": 153, "title": "item_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#crafting_table", "group": 160, "title": "item_required", "to": "zone_item#crafting_table in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 169, "title": "item_required", "to": "item#iron_ingot", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 170, "title": "item_required", "to": "item#gold_ingot", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 174, "title": "item_required", "to": "item#stick", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#wood_plank", "group": 175, "title": "item_required", "to": 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1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#nether", "group": 146, "title": "zone_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#nether", "group": 154, "title": "zone_required", "to": "item#blaze_rod", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#meadow", "group": 4, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#meadow", "group": 10, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 21, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#meadow", "group": 26, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#meadow", "group": 31, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#meadow", "group": 36, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#meadow", "group": 41, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#meadow", "group": 46, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#meadow", "group": 52, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#meadow", "group": 59, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 62, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#meadow", "group": 65, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#meadow", "group": 68, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#meadow", "group": 71, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#meadow", "group": 74, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#meadow", "group": 94, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 99, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#meadow", "group": 104, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#meadow", "group": 109, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#meadow", "group": 114, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#meadow", "group": 148, "title": "zone_required", "to": "item#egg", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#meadow", "group": 149, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#meadow", "group": 150, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#meadow", "group": 151, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#meadow", "group": 152, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 153, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#stronghold", "group": 2, "title": "start_item_in_zone", "to": "zone_item#close_ender_portal in zone", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#stronghold", "group": 7, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#stronghold", "group": 13, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#stronghold", "group": 18, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#stronghold", "group": 23, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#stronghold", "group": 28, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#stronghold", "group": 33, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#stronghold", "group": 38, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#stronghold", "group": 43, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#stronghold", "group": 55, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#end", "group": 8, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#end", "group": 156, "title": "zone_required", "to": "item#ender_pearl", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#end", "group": 158, "title": "zone_required", "to": "item#ender_pearl", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#end", "group": 159, "title": "zone_required", "to": "item#ender_dragon_head", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 9, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 14, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 19, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 24, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 29, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 34, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 39, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#forest", "group": 45, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 50, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 57, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 60, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 63, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#forest", "group": 66, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#forest", "group": 69, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#forest", "group": 72, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 75, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 77, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 79, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#forest", "group": 81, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#forest", "group": 83, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#forest", "group": 85, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 92, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 97, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 102, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#forest", "group": 107, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#forest", "group": 112, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#bedrock", "group": 6, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#bedrock", "group": 12, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#bedrock", "group": 17, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#bedrock", "group": 22, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#bedrock", "group": 27, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#bedrock", "group": 32, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 49, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#bedrock", "group": 54, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#bedrock", "group": 96, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#bedrock", "group": 101, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#bedrock", "group": 106, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#bedrock", "group": 111, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#bedrock", "group": 116, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#bedrock", "group": 118, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#bedrock", "group": 120, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#bedrock", "group": 122, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#bedrock", "group": 124, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 126, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#bedrock", "group": 128, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#bedrock", "group": 130, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#bedrock", "group": 132, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 133, "title": "zone_required", "to": "item#gold_ore", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 135, "title": "zone_required", "to": "item#gold_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 137, "title": "zone_required", "to": "item#diamond", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 138, "title": "zone_required", "to": "item#diamond", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 139, "title": "zone_required", "to": "item#obsidian", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 140, "title": "zone_required", "to": "item#redstone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 141, "title": "zone_required", "to": "item#redstone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#underground", "group": 5, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 11, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 16, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#underground", "group": 37, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#underground", "group": 42, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#underground", "group": 48, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#underground", "group": 53, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#underground", "group": 95, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#underground", "group": 100, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 105, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 110, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 115, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 117, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 119, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 121, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#underground", "group": 123, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#underground", "group": 125, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 127, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 129, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 131, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 155, "title": "zone_required", "to": "item#ender_pearl", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 157, "title": "zone_required", "to": "item#ender_pearl", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#forest", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#reeds", "label": "reeds", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 307.2}, {"color": "red", "id": "item#paper", "label": "paper", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 614.4}, {"color": "red", "id": "item#wood_plank", "label": "wood_plank", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 307.2}, {"color": "red", "id": "item#iron_ingot", "label": "iron_ingot", "level": 11, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1126.4}, {"color": "red", "id": "item#gold_ingot", "label": "gold_ingot", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1536.0}, {"color": "red", "id": "item#stick", "label": "stick", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 409.6}, {"color": "red", "id": "item#crafting_table", "label": "crafting_table", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 409.6}, {"color": "red", "id": "item#wood_pickaxe", "label": "wood_pickaxe", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 614.4}, {"color": "red", "id": "item#wood_axe", "label": "wood_axe", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 614.4}, {"color": "red", "id": "item#wood_shovel", "label": "wood_shovel", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 614.4}, {"color": "red", "id": "item#wood_sword", "label": "wood_sword", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 614.4}, {"color": "red", "id": "item#iron_shovel", "label": "iron_shovel", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 1228.8}, {"color": "red", "id": "item#dirt", "label": "dirt", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 204.8}, {"color": "red", "id": "item#gravel", "label": "gravel", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 716.8000000000001}, {"color": "red", "id": "item#gold_pickaxe", "label": "gold_pickaxe", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1638.4}, {"color": "red", "id": "item#cobblestone", "label": "cobblestone", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 716.8000000000001}, {"color": "red", "id": "item#coal", "label": "coal", "level": 10, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1024.0000000000002}, {"color": "red", "id": "item#netherrack", "label": "netherrack", "level": 20, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 2048.0000000000005}, {"color": "red", "id": "item#obsidian", "label": "obsidian", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1638.4}, {"color": "blue", "id": "zone_item#close_nether_portal in zone", "label": "close_nether_portal in zone", "level": 17, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 1740.8000000000002}, {"color": "red", "id": "item#enchanting_table", "label": "enchanting_table", "level": 17, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1740.8000000000002}, {"color": "red", "id": "item#gold_shovel", "label": "gold_shovel", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 1638.4}, {"color": "red", "id": "item#ender_eye", "label": "ender_eye", "level": 22, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 2252.8}, {"color": "blue", "id": "zone_item#open_ender_portal in zone", "label": "open_ender_portal in zone", "level": 23, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 2355.2000000000003}, {"color": "red", "id": "item#stone_pickaxe", "label": "stone_pickaxe", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 819.2}, {"color": "green", "id": "zone#underground", "label": "underground", "level": 9, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 921.5999999999999}, {"color": "red", "id": "item#iron_ore", "label": "iron_ore", "level": 10, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1024.0000000000002}, {"color": "red", "id": "item#leather", "label": "leather", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 716.8000000000001}, {"color": "red", "id": "item#stone_axe", "label": "stone_axe", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 819.2}, {"color": "red", "id": "item#wood", "label": "wood", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 204.8}, {"color": "red", "id": "item#diamond", "label": "diamond", "level": 14, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1433.6000000000001}, {"color": "red", "id": "item#diamond_pickaxe", "label": "diamond_pickaxe", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1536.0}, {"color": "red", "id": "item#diamond_axe", "label": "diamond_axe", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 1536.0}, {"color": "red", "id": "item#diamond_shovel", "label": "diamond_shovel", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1536.0}, {"color": "red", "id": "item#diamond_sword", "label": "diamond_sword", "level": 15, "shape": "dot", "size": 10, "title": "item", "x": 119.46666666666667, "y": 1536.0}, {"color": "red", "id": "item#furnace", "label": "furnace", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 597.3333333333333, "y": 819.2}, {"color": "blue", "id": "zone_item#furnace in zone", "label": "furnace in zone", "level": 9, "shape": "dot", "size": 10, "title": "zone_item", "x": 597.3333333333333, "y": 921.5999999999999}, {"color": "red", "id": "item#stone_shovel", "label": "stone_shovel", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 819.2}, {"color": "red", "id": "item#stone_sword", "label": "stone_sword", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 819.2}, {"color": "red", "id": "item#iron_pickaxe", "label": "iron_pickaxe", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1228.8}, {"color": "red", "id": "item#iron_axe", "label": "iron_axe", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 1228.8}, {"color": "red", "id": "item#iron_sword", "label": "iron_sword", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1228.8}, {"color": "red", "id": "item#gold_axe", "label": "gold_axe", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 1638.4}, {"color": "red", "id": "item#gold_sword", "label": "gold_sword", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1638.4}, {"color": "red", "id": "item#gold_ore", "label": "gold_ore", "level": 14, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1433.6000000000001}, {"color": "red", "id": "item#redstone", "label": "redstone", "level": 14, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1433.6000000000001}, {"color": "red", "id": "item#clock", "label": "clock", "level": 16, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 1638.4}, {"color": "red", "id": "item#book", "label": "book", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 819.2}, {"color": "red", "id": "item#blaze_rod", "label": "blaze_rod", "level": 20, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 2048.0000000000005}, {"color": "red", "id": "item#blaze_powder", "label": "blaze_powder", "level": 21, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 2150.4}, {"color": "green", "id": "zone#bedrock", "label": "bedrock", "level": 13, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 1331.2}, {"color": "red", "id": "item#ender_pearl", "label": "ender_pearl", "level": 13, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 1331.2}, {"color": "red", "id": "item#flint_and_steel", "label": "flint_and_steel", "level": 12, "shape": "dot", "size": 10, "title": "item", "x": 477.8666666666667, "y": 1228.8}, {"color": "blue", "id": "zone_item#open_nether_portal in zone", "label": "open_nether_portal in zone", "level": 18, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 1843.1999999999998}, {"color": "red", "id": "item#flint", "label": "flint", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 716.8000000000001, "y": 819.2}, {"color": "red", "id": "item#ender_dragon_head", "label": "ender_dragon_head", "level": 25, "shape": "dot", "size": 10, "title": "item", "x": 358.40000000000003, "y": 2560.0}, {"color": "blue", "id": "zone_item#enchanting_table in zone", "label": "enchanting_table in zone", "level": 18, "shape": "dot", "size": 10, "title": "zone_item", "x": 238.93333333333334, "y": 1843.1999999999998}, {"color": "blue", "id": "zone_item#crafting_table in zone", "label": "crafting_table in zone", "level": 5, "shape": "dot", "size": 10, "title": "zone_item", "x": 358.40000000000003, "y": 512.0000000000001}, {"color": "green", "id": "zone#end", "label": "end", "level": 24, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 2457.6}, {"color": "green", "id": "zone#nether", "label": "nether", "level": 19, "shape": "dot", "size": 10, "title": "zone", "x": 477.8666666666667, "y": 1945.6000000000004}, {"color": "green", "id": "zone#forest", "label": "forest", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 102.4}, {"color": "green", "id": "zone#meadow", "label": "meadow", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 358.40000000000003, "y": 204.8}, {"color": "green", "id": "zone#swamp", "label": "swamp", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 477.8666666666667, "y": 204.8}, {"color": "green", "id": "zone#stronghold", "label": "stronghold", "level": 19, "shape": "dot", "size": 10, "title": "zone", "x": 597.3333333333333, "y": 1945.6000000000004}, {"color": "blue", "id": "zone_item#close_ender_portal in zone", "label": "close_ender_portal in zone", "level": 20, "shape": "dot", "size": 10, "title": "zone_item", "x": 597.3333333333333, "y": 2048.0000000000005}, {"color": "red", "id": "item#egg", "label": "egg", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 238.93333333333334, "y": 307.2}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 358.40000000000003, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#reeds", "group": 177, "title": "item_required", "to": "item#paper", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 169, "title": "item_required", "to": "item#iron_ingot", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 170, "title": "item_required", "to": "item#gold_ingot", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 174, "title": "item_required", "to": "item#stick", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#wood_plank", "group": 175, "title": "item_required", "to": "item#crafting_table", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 185, "title": "item_required", "to": "item#wood_pickaxe", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 186, "title": "item_required", "to": "item#wood_axe", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 187, "title": "item_required", "to": "item#wood_shovel", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_plank", "group": 188, "title": "item_required", "to": "item#wood_sword", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#iron_shovel", "group": 66, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#iron_shovel", "group": 67, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#iron_shovel", "group": 68, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#iron_shovel", "group": 89, "title": "item_required", "to": "item#gravel", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_pickaxe", "group": 97, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#gold_pickaxe", "group": 98, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#gold_pickaxe", "group": 99, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "item#gold_pickaxe", "group": 100, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#gold_pickaxe", "group": 101, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_pickaxe", "group": 119, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#gold_pickaxe", "group": 120, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_pickaxe", "group": 143, "title": "item_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#obsidian", "group": 166, "title": "item_required", "to": "zone_item#close_nether_portal in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#obsidian", "group": 179, "title": "item_required", "to": "item#enchanting_table", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#gold_shovel", "group": 63, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "item#gold_shovel", "group": 64, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "item#gold_shovel", "group": 65, "title": "item_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#gold_shovel", "group": 88, "title": "item_required", "to": "item#gravel", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#wood_pickaxe", "group": 112, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#wood_pickaxe", "group": 113, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "item#wood_pickaxe", "group": 114, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#wood_pickaxe", "group": 115, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#wood_pickaxe", "group": 116, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#wood_pickaxe", "group": 125, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#wood_pickaxe", "group": 126, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#wood_pickaxe", "group": 146, "title": "item_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#ender_eye", "group": 168, "title": "item_required", "to": "zone_item#open_ender_portal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#stone_pickaxe", "group": 19, "title": "item_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#stone_pickaxe", "group": 20, "title": "item_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "item#stone_pickaxe", "group": 21, "title": "item_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "item#stone_pickaxe", "group": 22, "title": "item_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#stone_pickaxe", "group": 23, "title": "item_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#stone_pickaxe", "group": 107, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#stone_pickaxe", "group": 108, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "item#stone_pickaxe", "group": 109, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#stone_pickaxe", "group": 110, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "item#stone_pickaxe", "group": 111, "title": "item_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "item#stone_pickaxe", "group": 123, "title": "item_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "item#stone_pickaxe", "group": 124, 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"to", "color": "#FF7F007F", "from": "zone#bedrock", "group": 130, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#bedrock", "group": 132, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 133, "title": "zone_required", "to": "item#gold_ore", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 135, "title": "zone_required", "to": "item#gold_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 137, "title": "zone_required", "to": "item#diamond", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 138, "title": "zone_required", "to": "item#diamond", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 139, "title": "zone_required", "to": "item#obsidian", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#bedrock", "group": 140, "title": "zone_required", "to": "item#redstone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#bedrock", "group": 141, "title": "zone_required", "to": "item#redstone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#underground", "group": 5, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 11, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 16, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#underground", "group": 37, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#underground", "group": 42, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#underground", "group": 48, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#underground", "group": 53, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#underground", "group": 95, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#underground", "group": 100, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 105, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 110, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 115, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 117, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 119, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 121, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#underground", "group": 123, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#underground", "group": 125, "title": "zone_required", "to": "item#coal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 127, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 129, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#underground", "group": 131, "title": "zone_required", "to": "item#iron_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#underground", "group": 155, "title": "zone_required", "to": "item#ender_pearl", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#underground", "group": 157, "title": "zone_required", "to": "item#ender_pearl", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 9, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 14, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 19, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 24, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 29, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 34, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 39, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#forest", "group": 45, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 50, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 57, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 60, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 63, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#forest", "group": 66, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#forest", "group": 69, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#forest", "group": 72, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 75, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 77, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 79, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#forest", "group": 81, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#forest", "group": 83, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#forest", "group": 85, "title": "zone_required", "to": "item#wood", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#forest", "group": 92, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#forest", "group": 97, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#forest", "group": 102, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#forest", "group": 107, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#forest", "group": 112, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#meadow", "group": 4, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#meadow", "group": 10, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 21, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#meadow", "group": 26, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#meadow", "group": 31, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#meadow", "group": 36, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#meadow", "group": 41, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#meadow", "group": 46, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#meadow", "group": 52, "title": "zone_required", "to": "zone#stronghold", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#meadow", "group": 59, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 62, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#meadow", "group": 65, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#meadow", "group": 68, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#meadow", "group": 71, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#9999997F", "from": "zone#meadow", "group": 74, "title": "zone_required", "to": "item#dirt", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#meadow", "group": 94, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 99, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#meadow", "group": 104, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#meadow", "group": 109, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#meadow", "group": 114, "title": "zone_required", "to": "item#cobblestone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#meadow", "group": 148, "title": "zone_required", "to": "item#egg", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#meadow", "group": 149, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#meadow", "group": 150, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#meadow", "group": 151, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#meadow", "group": 152, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#meadow", "group": 153, "title": "zone_required", "to": "item#leather", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#nether", "group": 1, "title": "start_item_in_zone", "to": "zone_item#open_nether_portal in zone", "width": 1}, {"arrows": "to", "color": "#F781BF7F", "from": "zone#nether", "group": 45, "title": "zone_required", "to": "zone#forest", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#nether", "group": 46, "title": "zone_required", "to": "zone#meadow", "width": 1}, {"arrows": "to", "color": "#FFFF337F", "from": "zone#nether", "group": 47, "title": "zone_required", "to": "zone#swamp", "width": 1}, {"arrows": "to", "color": "#A656287F", "from": "zone#nether", "group": 48, "title": "zone_required", "to": "zone#underground", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#nether", "group": 49, "title": "zone_required", "to": "zone#bedrock", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#nether", "group": 134, "title": "zone_required", "to": "item#gold_ore", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#nether", "group": 136, "title": "zone_required", "to": "item#gold_ore", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#nether", "group": 142, "title": "zone_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#nether", "group": 143, "title": "zone_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#nether", "group": 144, "title": "zone_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone#nether", "group": 145, "title": "zone_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone#nether", "group": 146, "title": "zone_required", "to": "item#netherrack", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#nether", "group": 154, "title": "zone_required", "to": "item#blaze_rod", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#forest", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftBlockedUnlockPickup_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftBlockedUnlockPickup_requirements_graph.html
index 5dd02e40..cb761e8b 100644
--- a/docs/images/requirements_graphs/MiniHCraftBlockedUnlockPickup_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftBlockedUnlockPickup_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#weight", "label": "weight", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 320.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 320.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#box in zone", "label": "box in zone", "level": 6, "shape": "dot", "size": 10, "title": "zone_item", "x": 160.0, "y": 685.7142857142857}, {"color": "blue", "id": "zone_item#ball in zone", "label": "ball in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 320.0, "y": 457.1428571428571}, {"color": "blue", "id": "zone_item#blocked_locked_door in zone", "label": "blocked_locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 160.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#blocked_door in zone", "label": "blocked_door in zone", "level": 5, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 571.4285714285716}, {"color": "red", "id": "item#ball", "label": "ball", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 160.0, "y": 342.85714285714283}, {"color": "red", "id": "item#box", "label": "box", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 160.0, "y": 800.0}, {"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 457.1428571428571}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 3, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 342.85714285714283}, {"color": "green", "id": "zone#box_room", "label": "box_room", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 320.0, "y": 571.4285714285716}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 320.0, "y": 114.28571428571428}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 320.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#4DAF4A7F", "from": "item#weight", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#weight", "group": 8, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#weight", "group": 10, "title": "item_required", "to": "zone_item#ball in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 13, "title": "item_required", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#weight", "group": 15, "title": "item_required", "to": "zone_item#blocked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#ball", "group": 10, "title": "item_required", "to": "zone_item#ball in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#ball", "group": 13, "title": "item_required", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#ball", "group": 15, "title": "item_required", "to": "zone_item#blocked_door in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#box", "group": 8, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#key", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 14, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#blocked_locked_door in zone", "group": 12, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone_item#blocked_locked_door in zone", "group": 12, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#blocked_locked_door in zone", "group": 12, "title": "item_required_in_zone", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#locked_door in zone", "group": 13, "title": "item_required_in_zone", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 14, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#ball in zone", "group": 9, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone_item#ball in zone", "group": 9, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 15, "title": "item_required_in_zone", "to": "zone_item#blocked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 17, "title": "item_required_in_zone", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#box in zone", "group": 7, "title": "item_required_in_zone", "to": "item#box", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#box in zone", "group": 7, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone_item#blocked_door in zone", "group": 16, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone_item#blocked_door in zone", "group": 16, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#blocked_door in zone", "group": 16, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#box_room", "group": 3, "title": "zone_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#box_room", "group": 4, "title": "zone_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#box_room", "group": 18, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#start_room", "group": 2, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 11, "title": "zone_required", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 17, "title": "zone_required", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#weight", "label": "weight", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 320.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 160.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#box in zone", "label": "box in zone", "level": 6, "shape": "dot", "size": 10, "title": "zone_item", "x": 160.0, "y": 685.7142857142857}, {"color": "blue", "id": "zone_item#ball in zone", "label": "ball in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 320.0, "y": 457.1428571428571}, {"color": "blue", "id": "zone_item#blocked_locked_door in zone", "label": "blocked_locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 320.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#blocked_door in zone", "label": "blocked_door in zone", "level": 5, "shape": "dot", "size": 10, "title": "zone_item", "x": 320.0, "y": 571.4285714285716}, {"color": "red", "id": "item#box", "label": "box", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 160.0, "y": 800.0}, {"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 160.0, "y": 457.1428571428571}, {"color": "red", "id": "item#ball", "label": "ball", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 3, "shape": "dot", "size": 10, "title": "zone_item", "x": 160.0, "y": 342.85714285714283}, {"color": "green", "id": "zone#box_room", "label": "box_room", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 160.0, "y": 571.4285714285716}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 160.0, "y": 114.28571428571428}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 160.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#4DAF4A7F", "from": "item#weight", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#weight", "group": 8, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#weight", "group": 10, "title": "item_required", "to": "zone_item#ball in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 13, "title": "item_required", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#weight", "group": 15, "title": "item_required", "to": "zone_item#blocked_door in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#box", "group": 8, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "item#key", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 14, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#ball", "group": 10, "title": "item_required", "to": "zone_item#ball in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#ball", "group": 13, "title": "item_required", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#ball", "group": 15, "title": "item_required", "to": "zone_item#blocked_door in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#locked_door in zone", "group": 13, "title": "item_required_in_zone", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 14, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#FF7F007F", "from": "zone_item#blocked_door in zone", "group": 16, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone_item#blocked_door in zone", "group": 16, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#blocked_door in zone", "group": 16, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone_item#ball in zone", "group": 9, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#ball in zone", "group": 9, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#984EA37F", "from": "zone_item#blocked_locked_door in zone", "group": 12, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#blocked_locked_door in zone", "group": 12, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#blocked_locked_door in zone", "group": 12, "title": "item_required_in_zone", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 15, "title": "item_required_in_zone", "to": "zone_item#blocked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 17, "title": "item_required_in_zone", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#box in zone", "group": 7, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#box in zone", "group": 7, "title": "item_required_in_zone", "to": "item#box", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#box_room", "group": 3, "title": "zone_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#box_room", "group": 4, "title": "zone_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#box_room", "group": 18, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#start_room", "group": 2, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 11, "title": "zone_required", "to": "zone_item#blocked_locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 17, "title": "zone_required", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftCrossing_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftCrossing_requirements_graph.html
index 643a6dc5..9b27c98f 100644
--- a/docs/images/requirements_graphs/MiniHCraftCrossing_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftCrossing_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "blue", "id": "zone_item#lava in zone", "label": "lava in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 533.3333333333334}, {"color": "red", "id": "item#lava", "label": "lava", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 800.0}, {"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 533.3333333333334}, {"color": "red", "id": "item#goal", "label": "goal", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "green", "id": "zone#room", "label": "room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 266.6666666666667}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#lava in zone", "group": 4, "title": "item_required_in_zone", "to": "item#lava", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 2, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#room", "group": 1, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#room", "group": 3, "title": "zone_required", "to": "zone_item#lava in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#room", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 533.3333333333334}, {"color": "red", "id": "item#goal", "label": "goal", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "blue", "id": "zone_item#lava in zone", "label": "lava in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 533.3333333333334}, {"color": "red", "id": "item#lava", "label": "lava", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 800.0}, {"color": "green", "id": "zone#room", "label": "room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 266.6666666666667}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 2, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#lava in zone", "group": 4, "title": "item_required_in_zone", "to": "item#lava", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#room", "group": 1, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#room", "group": 3, "title": "zone_required", "to": "zone_item#lava in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#room", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftDoorKey_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftDoorKey_requirements_graph.html
index e72520ef..83584cdb 100644
--- a/docs/images/requirements_graphs/MiniHCraftDoorKey_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftDoorKey_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 457.1428571428571}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 6, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 685.7142857142857}, {"color": "red", "id": "item#goal", "label": "goal", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 800.0}, {"color": "green", "id": "zone#locked_room", "label": "locked_room", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 571.4285714285716}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 114.28571428571428}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 480.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#377EB87F", "from": "item#key", "group": 3, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 5, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 5, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 9, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 2, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 6, "title": "item_required_in_zone", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 4, "title": "zone_required", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 6, "title": "zone_required", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#locked_room", "group": 7, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#locked_room", "group": 8, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 457.1428571428571}, {"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 6, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 685.7142857142857}, {"color": "red", "id": "item#goal", "label": "goal", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "green", "id": "zone#locked_room", "label": "locked_room", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 571.4285714285716}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 228.57142857142856}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 114.28571428571428}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#377EB87F", "from": "item#key", "group": 3, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 5, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 9, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 6, "title": "item_required_in_zone", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 5, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 2, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#locked_room", "group": 7, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#locked_room", "group": 8, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 4, "title": "zone_required", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 6, "title": "zone_required", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftFourRooms_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftFourRooms_requirements_graph.html
index c1c388ad..f8b110c6 100644
--- a/docs/images/requirements_graphs/MiniHCraftFourRooms_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftFourRooms_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 640.0000000000001}, {"color": "red", "id": "item#goal", "label": "goal", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 800.0}, {"color": "green", "id": "zone#NW", "label": "NW", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 320.00000000000006}, {"color": "green", "id": "zone#NE", "label": "NE", "level": 3, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 480.0}, {"color": "green", "id": "zone#SW", "label": "SW", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 160.00000000000003}, {"color": "green", "id": "zone#SE", "label": "SE", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 320.00000000000006}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 480.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 2, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#NW", "group": 4, "title": "zone_required", "to": "zone#NE", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#NW", "group": 7, "title": "zone_required", "to": "zone#SW", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#NE", "group": 1, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#NE", "group": 5, "title": "zone_required", "to": "zone#SE", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#NE", "group": 9, "title": "zone_required", "to": "zone#NW", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#SW", "group": 6, "title": "zone_required", "to": "zone#SE", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#SW", "group": 10, "title": "zone_required", "to": "zone#NW", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#SE", "group": 3, "title": "zone_required", "to": "zone#NE", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#SE", "group": 8, "title": "zone_required", "to": "zone#SW", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#SW", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 640.0000000000001}, {"color": "red", "id": "item#goal", "label": "goal", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "green", "id": "zone#NW", "label": "NW", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 320.00000000000006}, {"color": "green", "id": "zone#NE", "label": "NE", "level": 3, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 480.0}, {"color": "green", "id": "zone#SW", "label": "SW", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 160.00000000000003}, {"color": "green", "id": "zone#SE", "label": "SE", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 320.00000000000006}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 2, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#NW", "group": 4, "title": "zone_required", "to": "zone#NE", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#NW", "group": 7, "title": "zone_required", "to": "zone#SW", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#NE", "group": 1, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#NE", "group": 5, "title": "zone_required", "to": "zone#SE", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#NE", "group": 9, "title": "zone_required", "to": "zone#NW", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#SE", "group": 3, "title": "zone_required", "to": "zone#NE", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#SE", "group": 8, "title": "zone_required", "to": "zone#SW", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#SW", "group": 6, "title": "zone_required", "to": "zone#SE", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#SW", "group": 10, "title": "zone_required", "to": "zone#NW", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#SW", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftKeyCorridor_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftKeyCorridor_requirements_graph.html
index 3941d494..1fd9164f 100644
--- a/docs/images/requirements_graphs/MiniHCraftKeyCorridor_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftKeyCorridor_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#weight", "label": "weight", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 614.4}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 5, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 512.0}, {"color": "red", "id": "item#key", "label": "key", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 614.4}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 7, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 716.8}, {"color": "blue", "id": "zone_item#blue_closed_door in zone", "label": "blue_closed_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 204.80000000000004}, {"color": "blue", "id": "zone_item#blue_open_door in zone", "label": "blue_open_door in zone", "level": 3, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 307.2}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 204.80000000000004}, {"color": "green", "id": "zone#key_room", "label": "key_room", "level": 4, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 409.6000000000001}, {"color": "blue", "id": "zone_item#ball in zone", "label": "ball in zone", "level": 9, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 921.6000000000001}, {"color": "red", "id": "item#ball", "label": "ball", "level": 10, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 1024.0}, {"color": "green", "id": "zone#locked_room", "label": "locked_room", "level": 8, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 819.2000000000002}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 102.40000000000002}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#key", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 11, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#blue_closed_door in zone", "group": 7, "title": "item_required_in_zone", "to": "zone_item#blue_open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 11, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#blue_open_door in zone", "group": 8, "title": "item_required_in_zone", "to": "zone#key_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#ball in zone", "group": 13, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#ball in zone", "group": 13, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 12, "title": "item_required_in_zone", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#locked_room", "group": 3, "title": "start_item_in_zone", "to": "zone_item#ball in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#locked_room", "group": 10, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#key_room", "group": 4, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#key_room", "group": 9, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "start_item_in_zone", "to": "zone_item#blue_closed_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 2, "title": "start_item_in_zone", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 8, "title": "zone_required", "to": "zone#key_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 12, "title": "zone_required", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#weight", "label": "weight", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 614.4}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 5, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 512.0}, {"color": "red", "id": "item#key", "label": "key", "level": 6, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 614.4}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 7, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 716.8}, {"color": "blue", "id": "zone_item#ball in zone", "label": "ball in zone", "level": 9, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 921.6000000000001}, {"color": "red", "id": "item#ball", "label": "ball", "level": 10, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 1024.0}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 204.80000000000004}, {"color": "blue", "id": "zone_item#blue_closed_door in zone", "label": "blue_closed_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 204.80000000000004}, {"color": "blue", "id": "zone_item#blue_open_door in zone", "label": "blue_open_door in zone", "level": 3, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 307.2}, {"color": "green", "id": "zone#key_room", "label": "key_room", "level": 4, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 409.6000000000001}, {"color": "green", "id": "zone#locked_room", "label": "locked_room", "level": 8, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 819.2000000000002}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 102.40000000000002}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#key", "group": 6, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 11, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#ball in zone", "group": 13, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#ball in zone", "group": 13, "title": "item_required_in_zone", "to": "item#ball", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 11, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 5, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#blue_closed_door in zone", "group": 7, "title": "item_required_in_zone", "to": "zone_item#blue_open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#blue_open_door in zone", "group": 8, "title": "item_required_in_zone", "to": "zone#key_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 12, "title": "item_required_in_zone", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#key_room", "group": 4, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#key_room", "group": 9, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#locked_room", "group": 3, "title": "start_item_in_zone", "to": "zone_item#ball in zone", "width": 1}, {"arrows": "to", "color": "#4DAF4A7F", "from": "zone#locked_room", "group": 10, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "start_item_in_zone", "to": "zone_item#blue_closed_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 2, "title": "start_item_in_zone", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 8, "title": "zone_required", "to": "zone#key_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 12, "title": "zone_required", "to": "zone#locked_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftMultiRoom_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftMultiRoom_requirements_graph.html
index bc22ce24..7225d0c4 100644
--- a/docs/images/requirements_graphs/MiniHCraftMultiRoom_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftMultiRoom_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 7, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 716.8000000000001}, {"color": "red", "id": "item#goal", "label": "goal", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 819.2}, {"color": "green", "id": "zone#6", "label": "6", "level": 6, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 614.4000000000001}, {"color": "green", "id": "zone#5", "label": "5", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 512.0}, {"color": "green", "id": "zone#1", "label": "1", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 102.4}, {"color": "green", "id": "zone#2", "label": "2", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 204.8}, {"color": "green", "id": "zone#4", "label": "4", "level": 4, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 409.6}, {"color": "green", "id": "zone#3", "label": "3", "level": 3, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 307.20000000000005}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 2, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#6", "group": 1, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#6", "group": 11, "title": "zone_required", "to": "zone#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#1", "group": 4, "title": "zone_required", "to": "zone#2", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#4", "group": 7, "title": "zone_required", "to": "zone#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#4", "group": 10, "title": "zone_required", "to": "zone#5", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#5", "group": 9, "title": "zone_required", "to": "zone#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#5", "group": 12, "title": "zone_required", "to": "zone#6", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#2", "group": 3, "title": "zone_required", "to": "zone#1", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#2", "group": 6, "title": "zone_required", "to": "zone#3", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#3", "group": 5, "title": "zone_required", "to": "zone#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#3", "group": 8, "title": "zone_required", "to": "zone#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#1", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "blue", "id": "zone_item#goal in zone", "label": "goal in zone", "level": 7, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 716.8000000000001}, {"color": "red", "id": "item#goal", "label": "goal", "level": 8, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 819.2}, {"color": "green", "id": "zone#2", "label": "2", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 204.8}, {"color": "green", "id": "zone#1", "label": "1", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 102.4}, {"color": "green", "id": "zone#3", "label": "3", "level": 3, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 307.20000000000005}, {"color": "green", "id": "zone#4", "label": "4", "level": 4, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 409.6}, {"color": "green", "id": "zone#5", "label": "5", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 512.0}, {"color": "green", "id": "zone#6", "label": "6", "level": 6, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 614.4000000000001}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#goal in zone", "group": 2, "title": "item_required_in_zone", "to": "item#goal", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#2", "group": 3, "title": "zone_required", "to": "zone#1", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#2", "group": 6, "title": "zone_required", "to": "zone#3", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#3", "group": 5, "title": "zone_required", "to": "zone#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#3", "group": 8, "title": "zone_required", "to": "zone#4", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#5", "group": 9, "title": "zone_required", "to": "zone#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#5", "group": 12, "title": "zone_required", "to": "zone#6", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#6", "group": 1, "title": "zone_required", "to": "zone_item#goal in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#6", "group": 11, "title": "zone_required", "to": "zone#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#1", "group": 4, "title": "zone_required", "to": "zone#2", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#4", "group": 7, "title": "zone_required", "to": "zone#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#4", "group": 10, "title": "zone_required", "to": "zone#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#1", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/MiniHCraftUnlockPickup_requirements_graph.html b/docs/images/requirements_graphs/MiniHCraftUnlockPickup_requirements_graph.html
index 35b9da23..ddfcaf29 100644
--- a/docs/images/requirements_graphs/MiniHCraftUnlockPickup_requirements_graph.html
+++ b/docs/images/requirements_graphs/MiniHCraftUnlockPickup_requirements_graph.html
@@ -89,7 +89,7 @@ <h1></h1>
 
                   // parsing and collecting nodes and edges from the python
                   nodes = new vis.DataSet([{"color": "red", "id": "item#weight", "label": "weight", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#key in zone", "label": "key in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 228.57142857142856}, {"color": "blue", "id": "zone_item#box in zone", "label": "box in zone", "level": 6, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 685.7142857142857}, {"color": "red", "id": "item#box", "label": "box", "level": 7, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 342.85714285714283}, {"color": "blue", "id": "zone_item#open_door in zone", "label": "open_door in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 457.1428571428571}, {"color": "blue", "id": "zone_item#locked_door in zone", "label": "locked_door in zone", "level": 2, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 228.57142857142856}, {"color": "green", "id": "zone#box_room", "label": "box_room", "level": 5, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 571.4285714285716}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 114.28571428571428}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 3, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 6, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#box", "group": 6, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#key", "group": 3, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 8, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 8, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#box in zone", "group": 5, "title": "item_required_in_zone", "to": "item#box", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#box in zone", "group": 5, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 2, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 2, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 9, "title": "item_required_in_zone", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#box_room", "group": 4, "title": "zone_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#box_room", "group": 10, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 7, "title": "zone_required", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 9, "title": "zone_required", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 3, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#weight", "group": 6, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#box", "group": 6, "title": "item_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "item#key", "group": 3, "title": "item_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 8, "title": "item_required", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_door in zone", "group": 8, "title": "item_required_in_zone", "to": "zone_item#open_door in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone_item#box in zone", "group": 5, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#box in zone", "group": 5, "title": "item_required_in_zone", "to": "item#box", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 2, "title": "item_required_in_zone", "to": "item#weight", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#key in zone", "group": 2, "title": "item_required_in_zone", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#open_door in zone", "group": 9, "title": "item_required_in_zone", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#box_room", "group": 4, "title": "zone_required", "to": "zone_item#box in zone", "width": 1}, {"arrows": "to", "color": "#377EB87F", "from": "zone#box_room", "group": 10, "title": "zone_required", "to": "zone#start_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 1, "title": "zone_required", "to": "zone_item#key in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 7, "title": "zone_required", "to": "zone_item#locked_door in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 9, "title": "zone_required", "to": "zone#box_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/RecursiveHcraft-I6_requirements_graph.html b/docs/images/requirements_graphs/RecursiveHcraft-I6_requirements_graph.html
index ea4bcce0..d9034a0c 100644
--- a/docs/images/requirements_graphs/RecursiveHcraft-I6_requirements_graph.html
+++ b/docs/images/requirements_graphs/RecursiveHcraft-I6_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#2", "label": "2", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 320.00000000000006}, {"color": "red", "id": "item#3", "label": "3", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 480.0}, {"color": "red", "id": "item#4", "label": "4", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 640.0000000000001}, {"color": "red", "id": "item#5", "label": "5", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "red", "id": "item#0", "label": "0", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 0.0}, {"color": "red", "id": "item#1", "label": "1", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 160.00000000000003}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#4", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 1, "title": "item_required", "to": "item#1", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 5, "title": "item_required", "to": "item#5", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#3", "label": "3", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 480.0}, {"color": "red", "id": "item#4", "label": "4", "level": 4, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 640.0000000000001}, {"color": "red", "id": "item#5", "label": "5", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "red", "id": "item#1", "label": "1", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 160.00000000000003}, {"color": "red", "id": "item#2", "label": "2", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 320.00000000000006}, {"color": "red", "id": "item#0", "label": "0", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#4", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 1, "title": "item_required", "to": "item#1", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 2, "title": "item_required", "to": "item#2", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 5, "title": "item_required", "to": "item#5", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
@@ -119,7 +119,7 @@ <h1></h1>
         "hideNodesOnDrag": false
     },
     "physics": {
-        "enabled": true,
+        "enabled": false,
         "stabilization": {
             "enabled": true,
             "fit": true,
diff --git a/docs/images/requirements_graphs/TowerHcraft-H2-W3_requirements_graph.html b/docs/images/requirements_graphs/TowerHcraft-H2-W3_requirements_graph.html
index 5b42d941..ec45e0d2 100644
--- a/docs/images/requirements_graphs/TowerHcraft-H2-W3_requirements_graph.html
+++ b/docs/images/requirements_graphs/TowerHcraft-H2-W3_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#5", "label": "5", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 400.0}, {"color": "red", "id": "item#6", "label": "6", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 240.0, "y": 800.0}, {"color": "red", "id": "item#0", "label": "0", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 0.0}, {"color": "red", "id": "item#3", "label": "3", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 240.0, "y": 400.0}, {"color": "red", "id": "item#4", "label": "4", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 400.0}, {"color": "red", "id": "item#1", "label": "1", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 240.0, "y": 0.0}, {"color": "red", "id": "item#2", "label": "2", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#5", "group": 6, "title": "item_required", "to": "item#6", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#4", "group": 6, "title": "item_required", "to": "item#6", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 6, "title": "item_required", "to": "item#6", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#3", "label": "3", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 400.0}, {"color": "red", "id": "item#6", "label": "6", "level": 2, "shape": "dot", "size": 10, "title": "item", "x": 240.0, "y": 800.0}, {"color": "red", "id": "item#1", "label": "1", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 240.0, "y": 0.0}, {"color": "red", "id": "item#4", "label": "4", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 400.0}, {"color": "red", "id": "item#5", "label": "5", "level": 1, "shape": "dot", "size": 10, "title": "item", "x": 240.0, "y": 400.0}, {"color": "red", "id": "item#2", "label": "2", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 0.0}, {"color": "red", "id": "item#0", "label": "0", "level": 0, "shape": "dot", "size": 10, "title": "item", "x": 480.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#3", "group": 6, "title": "item_required", "to": "item#6", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#1", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#4", "group": 6, "title": "item_required", "to": "item#6", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#2", "group": 5, "title": "item_required", "to": "item#5", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#5", "group": 6, "title": "item_required", "to": "item#6", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 3, "title": "item_required", "to": "item#3", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 4, "title": "item_required", "to": "item#4", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "item#0", "group": 5, "title": "item_required", "to": "item#5", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/docs/images/requirements_graphs/TreasureHcraft_requirements_graph.html b/docs/images/requirements_graphs/TreasureHcraft_requirements_graph.html
index fcc6017a..67a633e0 100644
--- a/docs/images/requirements_graphs/TreasureHcraft_requirements_graph.html
+++ b/docs/images/requirements_graphs/TreasureHcraft_requirements_graph.html
@@ -88,8 +88,8 @@ <h1></h1>
                   
 
                   // parsing and collecting nodes and edges from the python
-                  nodes = new vis.DataSet([{"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 480.0}, {"color": "blue", "id": "zone_item#treasure_chest in zone", "label": "treasure_chest in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 640.0000000000001}, {"color": "red", "id": "item#gold", "label": "gold", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "blue", "id": "zone_item#locked_chest in zone", "label": "locked_chest in zone", "level": 3, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 480.0}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 160.00000000000003}, {"color": "green", "id": "zone#key_room", "label": "key_room", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 320.00000000000006}, {"color": "green", "id": "zone#treasure_room", "label": "treasure_room", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 320.00000000000006}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 0.0, "y": 0.0}]);
-                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 4, "title": "item_required", "to": "zone_item#treasure_chest in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#treasure_chest in zone", "group": 2, "title": "item_required_in_zone", "to": "item#gold", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_chest in zone", "group": 4, "title": "item_required_in_zone", "to": "zone_item#treasure_chest in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 5, "title": "zone_required", "to": "zone#key_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 6, "title": "zone_required", "to": "zone#treasure_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#key_room", "group": 3, "title": "zone_required", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#treasure_room", "group": 1, "title": "start_item_in_zone", "to": "zone_item#locked_chest in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
+                  nodes = new vis.DataSet([{"color": "red", "id": "item#key", "label": "key", "level": 3, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 480.0}, {"color": "blue", "id": "zone_item#treasure_chest in zone", "label": "treasure_chest in zone", "level": 4, "shape": "dot", "size": 10, "title": "zone_item", "x": 0.0, "y": 640.0000000000001}, {"color": "blue", "id": "zone_item#locked_chest in zone", "label": "locked_chest in zone", "level": 3, "shape": "dot", "size": 10, "title": "zone_item", "x": 480.0, "y": 480.0}, {"color": "red", "id": "item#gold", "label": "gold", "level": 5, "shape": "dot", "size": 10, "title": "item", "x": 0.0, "y": 800.0}, {"color": "green", "id": "zone#key_room", "label": "key_room", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 0.0, "y": 320.00000000000006}, {"color": "green", "id": "zone#treasure_room", "label": "treasure_room", "level": 2, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 320.00000000000006}, {"color": "green", "id": "zone#start_room", "label": "start_room", "level": 1, "shape": "dot", "size": 10, "title": "zone", "x": 480.0, "y": 160.00000000000003}, {"color": "black", "id": "START#", "label": "START#", "level": 0, "shape": "dot", "size": 10, "title": "start", "x": 480.0, "y": 0.0}]);
+                  edges = new vis.DataSet([{"arrows": "to", "color": "#E41A1C7F", "from": "item#key", "group": 4, "title": "item_required", "to": "zone_item#treasure_chest in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#locked_chest in zone", "group": 4, "title": "item_required_in_zone", "to": "zone_item#treasure_chest in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone_item#treasure_chest in zone", "group": 2, "title": "item_required_in_zone", "to": "item#gold", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#key_room", "group": 3, "title": "zone_required", "to": "item#key", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#treasure_room", "group": 1, "title": "start_item_in_zone", "to": "zone_item#locked_chest in zone", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 5, "title": "zone_required", "to": "zone#key_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "zone#start_room", "group": 6, "title": "zone_required", "to": "zone#treasure_room", "width": 1}, {"arrows": "to", "color": "#E41A1C7F", "from": "START#", "group": 0, "title": "start_zone", "to": "zone#start_room", "width": 1}]);
 
                   nodeColors = {};
                   allNodes = nodes.get({ returnType: "Object" });
diff --git a/src/hcraft/requirements.py b/src/hcraft/requirements.py
index e1822546..5001c47c 100644
--- a/src/hcraft/requirements.py
+++ b/src/hcraft/requirements.py
@@ -728,7 +728,7 @@ def scale(val, axis: int):
         serializable_graph.nodes[node]["x"] = scale(x, 0)
         serializable_graph.nodes[node]["y"] = scale(y, 1)
     nt.from_nx(serializable_graph)
-    nt.toggle_physics(True)
+    nt.toggle_physics(False)
     nt.inherit_edge_colors(False)
     nt.show(str(filepath))