PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The appetite for water in the United States has grown considerably as oil and gas producers hydraulic fracture wells from the Marcellus and other shale plays.
http://www.w3.org/ns/prov#wasQuotedFrom
  • rigzone.com