PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Coal is composed mostly of carbon and carbon-containing compounds but also naturally contains uranium, thorium, and other naturally occuring radioisotopes.
http://www.w3.org/ns/prov#wasQuotedFrom
  • texas.gov