PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • exploration and production of shale gas especially in the U.S. enabled the global chemical industry to cut costs by using hydrocarbon raw materials such as ethane, industry sources said.
http://www.w3.org/ns/prov#wasQuotedFrom
  • koreaherald.com