PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Until recently, the U.S. oil and natural gas industry mostly followed the ups and downs of world oil prices, but with a long-term decline that reflected the decreasing availability of U.S. oil and natural gas resources.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cfr.org