PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In this area, energy firms are meeting the call; since the turn of the 21st century, America???s technology-driven energy industry has invested more than $2 trillion in U.S. capital projects and research and development to advance all forms of energy, including alternatives.
http://www.w3.org/ns/prov#wasQuotedFrom
  • theatlantic.com