PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Until renewable sources are ready to shoulder this burden, fossil fuels such as oil, coal, natural gas - and perhaps oil shale and their other unconventional counterparts - will continue to be important and necessary energy sources.
http://www.w3.org/ns/prov#wasQuotedFrom
  • centerwest.org