PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Natural gas is a major input cost in making urea and urea ammonium nitrate from nitrogen condensed out of the air.
http://www.w3.org/ns/prov#wasQuotedFrom
  • fool.com