Distinct subjects for predicate prov:constraints sorted by frequency

Resource	Count
prov:Activity	2
prov:alternateOf	2
prov:Attribution	2
prov:Communication	2
prov:Derivation	2
prov:End	2
prov:Entity	2
prov:Generation	2
prov:InstantaneousEvent	2
prov:Invalidation	2
prov:specializationOf	2
prov:Start	2
prov:Usage	2