Distinct subjects for predicate prov:constraints sorted by frequency

Resource	Count
prov:Activity	1
prov:Attribution	1
prov:Communication	1
prov:Derivation	1
prov:End	1
prov:Entity	1
prov:Generation	1
prov:InstantaneousEvent	1
prov:Invalidation	1
prov:Start	1
prov:Usage	1
prov:alternateOf	1
prov:specializationOf	1