PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In a series of best-selling books with such catchy titles as The Flying Saucers Are Real (1950) and The Flying Saucer Conspiracy (1955), Keyhoe claims that sightings such as occurred in Washington were genuine visits from alien spacecraft with unknown motives.
http://www.w3.org/ns/prov#wasQuotedFrom
  • popmatters.com