PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The gas, which is trapped in shale and other geological formations, can be extracted, purified and burned as a fuel source that emits less carbon dioxide than traditional energy sources such as oil and coal.
http://www.w3.org/ns/prov#wasQuotedFrom
  • salemnews.net