Wake of conversion: a temporal profile

csv2rdf4lod-automation is licensed under the [Apache License, Version 2.0](https://github.com/timrdf/csv2rdf4lod-automation/wiki/License)

See also Querying datasets created by csv2rdf4lod.

(results):

PREFIX dcterms:    <http://purl.org/dc/terms/>
PREFIX conversion: <http://purl.org/twc/vocab/conversion/>
SELECT DISTINCT ?layer max(?modified) as ?last_modified ?triples 
WHERE {
   GRAPH <http://logd.tw.rpi.edu/vocab/Dataset> {
      ?layer a conversion:LayerDataset;
             dcterms:modified ?modified .
      { ?layer conversion:num_triples ?triples } 
      UNION 
      { ?layer void:subset [ conversion:num_triples ?triples ] }
   }
} ORDER BY ?last_modified