PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Methanol and ethylene, which can be made from coal gas, are used to make products such as plastics, medicines, fertilizers and tar.
http://www.w3.org/ns/prov#wasQuotedFrom
  • yahoo.com