PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, tidal energy is a reliable ??? though relatively up and coming ??? form of renewable energy that could work well with the current grid.
http://www.w3.org/ns/prov#wasQuotedFrom
  • renewableenergyfocus.com