PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For some applications ??? air transportation and the manufacture of plastics and other synthetic materials being among the most important ??? there is currently no substitute for petroleum.
http://www.w3.org/ns/prov#wasQuotedFrom
  • peakoil.com