PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Most methane leakage comes in areas where they are producing liquids (oil, condensate and natural gas liquids) and the natural gas is a by-product.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cfr.org