Copy_to_Wikimedia_Commons_(bot-assessed) Creative_Commons_Attribution-ShareAlike_3.0_files
These contain only files.
Stub-Class_biography_articles Automatically_assessed_biography_articles WikiProject_Disambiguation_pages
These contain only talk pages.
Also, all of them are indirect subcategories of Category:Wikipedia administration.
Neither of these might be easy to find out for your, but I think at least one of them should be doable.
and hope there are not too many loops!
Just 2500 of them. [1]
[1]: http://en.wikipedia.org/wiki/Wikipedia:Dump_reports/Category_cycles
Petr Onderka [[en:User:Svick]]