PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These risks include a mass extinction such as occurred with global warming at the Permian-Triassic boundary.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleantechnica.com