PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fracking at a single well requires a mixture of millions of gallons of fresh water with sand and chemicals, including known carcinogens and neurotoxins for which there are no safe human exposure levels.
http://www.w3.org/ns/prov#wasQuotedFrom
  • goerie.com