PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • First problem that comes to my mind though is that, like shale gas, the process of extracting this oil is an environmental disaster.
http://www.w3.org/ns/prov#wasQuotedFrom
  • macleans.ca