PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The cause of depression and its symptoms are a mystery but we do understand that it is an illness associated with biochemical changes in the brain.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikibooks.org