PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The greenhouse gas reporting system covers carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and other fluorinated gases.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleantechnica.com