Correct erroneous use of P518
Correct erroneous use of P518

Subcollections should not be added as qualifier of collection, but
should instead be added as the collection and those objects should
then clarify that they are subcollections.

As a result the initial wqd query must also be fixed

Existing problems were solved using
https://gist.github.com/lokal-profil/87351fe336a5b1125e7f

lokal-profil/wikidata-stuff