PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Almost universally such supplies comprise mixtures of methane, ethane, natural gas liquids (C3 's and higher) and acid gases such as carbon dioxide and hydrogen sulfide.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com