Distinct subjects for predicate <http://www.wikidata.org/prop/reference/P50> sorted by frequency

ResourceCount
<http://www.wikidata.org/reference/812eeb80322ef9bf287e1ead51cf398c087ae067>1
<http://www.wikidata.org/reference/8cf6d519c319c5433e570c0fe34b54ae8eb73d72>1
<http://www.wikidata.org/reference/ab1b640cc83b10b83e6767f94ce0f20150c9b3cc>1