PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Production tubing is generally suspended from the wellhead assembly during normal operations to conduct production fluids, such as oil and natural gas and other fluids, to the surface and out of the well to production facilities for processing.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com