PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Smaller amounts come from natural gas, nuclear power, oil and other sources, most of which pose problems to the environment or to our energy security.
http://www.w3.org/ns/prov#wasQuotedFrom
  • energybulletin.net