PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These components are reacted to produce a process gas rich in methane and containing minor amounts of carbon dioxide, and other impurities.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com