PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The decline in travel because of the recession made airports and the skies less crowded, reducing flight delays and cancellations when bad weather or other problems forced airlines to thin out schedules.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wsj.com