PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Landfill gas is about 40% to 60% methane, with the remainder consisting mostly of carbon dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wbdg.org