PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fossil fuels also contain radioactive materials, mainly uranium and thorium, that are released into the atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom
  • newworldencyclopedia.org