PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Gamma rays are generated in very energetic events such as supernovae, in and around bodies of exotic matter like neutron stars, pulsars, and black holes, or in a less spectacular fashion when radioactive nuclei break down in the interstellar medium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wisegeek.com