PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The wastewater is a mixture of the injected freshwater, fracking chemicals, and deep formation water, which is usually briny and often mildly radioactive.
http://www.w3.org/ns/prov#wasQuotedFrom
  • truthdig.com