PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The second way to reduce CO2 emissions in cement production is to require that it blend materials such as limestone to replace some of the clinker in the production of Portland Cement.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleantechnica.com