PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Mounds of Petcoke, the carbon residue of tar sands refining, piled up for export for burning, have produced toxic dust storms that have left area residents gasping near Detroit, Chicago, and other locales.
http://www.w3.org/ns/prov#wasQuotedFrom
  • dailykos.com