PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As a result, gas, oil, and other fluids can be efficiently produced at the surface from a low pressure or low porosity formation.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com