PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Scientists first postulated their existence in the 1930s, and believe that they are generated by nuclear fusion in stars and possibly by supernovas and other violent cosmic events, as well as by nuclear reactors and nuclear bombs.
http://www.w3.org/ns/prov#wasQuotedFrom
  • hcn.org