PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Of course, not all the methane detected above gasfields results from extraction operations; some has come from sources such as wetlands or cattle and sheep.
http://www.w3.org/ns/prov#wasQuotedFrom
  • greenleft.org.au