0 results returned for query(hub, c("ENCODE","CTCF", "Mus Musculus", "ESC"))

[chrisclarkson]

I apologise if this is not a suitable place to ask a question of this type but I could not find any answers on the Bioconductor forum, link to my question: https://support.bioconductor.org/p/100245/

I am confused that the following code returns 0 datasets:
library(AnnotationHub)
hub=Annotationhub()
ctcf_imr90 <- query(hub, c("ENCODE","CTCF", "Mus Musculus", "ESC"))
AnnotationHub with 0 records
snapshotDate(): 2016-10-11_

I am trying to query ENCODE for all the datasets it has on CTCF in the mm9 genome. I would have thought that this would be a fairly standard thing but it comes up with no results...

This produces no results so I tried omitting CTCF and it returned many results.... This isn't the end of the world because I can just get the datasets I'm interested in directly from ENCODE but it's a bit of a pain and I would prefer if I could get it the Bioconductor way. Is it common for annotation queries as common as this to not return any results?