PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In recent months, commodity prices have fallen, largely due to concerns about a slowdown in the global economy, though oil, copper, cotton and other industrial materials remain high compared with a decade ago.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wsj.com