PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Acid rain is a serious environmental problem that affects large parts of the US and Canada. (EPA, 2006) Acid rain accelerates weathering in carbonate rocks and accelerates building weathering.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sciencebuddies.org