PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Sources adjacent to a main sequence star similar to our sun (other types of stars are thought to be unlikely to support habitable planets)
http://www.w3.org/ns/prov#wasQuotedFrom
  • oreilly.com