PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The new oil being found and produced is in ultra-deep ocean waters, in sands that must be heated to release the hydrocarbons or trapped in shale or other tight rock that requires constant drilling to keep production steady.
http://www.w3.org/ns/prov#wasQuotedFrom
  • startribune.com