PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • There has been great success in the past dramatically lowering the cost and increasing the efficiency of semiconductors, so if there is an equivalent to Moore's law for solar cells then a good part of our energy problems are solved.
http://www.w3.org/ns/prov#wasQuotedFrom
  • econlib.org