PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The highest source of mercury in America's air and water results from the burning of fossil fuels, such as coal, at utilities that supply electricity.
http://www.w3.org/ns/prov#wasQuotedFrom
  • enn.com