PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This problem is a special case of the subgraph isomorphism problem,[6] which is known to be NP-complete.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org