PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Greenhouse gases in the atmosphere, such as carbon dioxide, methane and nitrous oxide, absorb part of the infra-red radiation emitted from the earth and then return part of the re-emitted radiation to the earth.
http://www.w3.org/ns/prov#wasQuotedFrom
  • hko.gov.hk