PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Electricity itself is a clean energy, which does not produce CO2 when being used, but lots of CO2 is generated when it is produced.
http://www.w3.org/ns/prov#wasQuotedFrom
  • juko-in.or.jp