PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The purpose of fracking is to break into tight geological formations, principally shale, in order to release trapped natural gas, and occasionally oil.
http://www.w3.org/ns/prov#wasQuotedFrom
  • barnstablepatriot.com