PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A black hole is a region of space whose attractive gravitational force is so intense that no matter, light, or communication of any kind can escape.
http://www.w3.org/ns/prov#wasQuotedFrom
  • pbs.org