PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Columbus was a man who lived in an age of deep crisis whereby the fortunes of the Christian world were threatened by economic crisis and impending conquest by Islam in the newly resurgent Ottoman Empire whose dream it was to replace the Christian cross with the Crescent of Islam, something they accomplished shortly two years after the birth of Columbus when they conquered Constantinple the capital
http://www.w3.org/ns/prov#wasQuotedFrom
  • about.com