PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Of the five biggest sources of America???s foreign oil addiction (Canada, Mexico, Venezuela, Saudi Arabia, and Nigeria), all except Canada are in serious danger from terrorists, anti-American nationalists, and/or mature oil fields starting to show worrisome signs of long-term neglect.
http://www.w3.org/ns/prov#wasQuotedFrom
  • energybulletin.net