PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • the so-called greenhouse effect, a warming of Earth???s surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, and other greenhouse gases.
http://www.w3.org/ns/prov#wasQuotedFrom
  • britannica.com