PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A carbon price can be established either through a tax or through a cap-and-trade system, such as the one Europe adopted after signing up to Kyoto.
http://www.w3.org/ns/prov#wasQuotedFrom
  • economist.com