PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Accordingly, there is a need for a method to upgrade tar sand to produce a hydrocarbon having a low concentration of water and solids.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com