PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • nd Astrophysics, SAO scientists and their colleagues were able to confirm the existence of a previously theoretical phenomenon known as an event horizon, the one-way membrane surrounding a black hole, and the place at which all forms of matter and energy, including light, begin to fall into this gravitational trap, never to escape.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nasa.gov