PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It has to be a matter of natural supply and demand, and as long as oil is the cheapest route it will be used.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org