PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The Keystone XL pipeline would not only carry tar sands oil, one of the dirtiest and costliest fuels on the planet, 2,000 miles from Canada through America???s heartland, but promises to raise gas prices in the Midwest.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nwf.org