PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • At this time, ground-source heat pumps are expensive, especially in comparison to traditional air conditioners and furnaces.
http://www.w3.org/ns/prov#wasQuotedFrom
  • geothermalenergyprosandcons.com