PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Oil shale is a sedimentary rock which contains organic matter called Kerogen; it can be converted via pyrolysis into a synthetic crude oil; distilled through heating into oil similar to petroleum; or burned directly as a low-grade fuel.
http://www.w3.org/ns/prov#wasQuotedFrom
  • iei-energy.com