PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The ???greenhouse effect??? hypothesis asserts that without ???greenhouse gases??? in the atmosphere the global mean temperature would be 33 C cooler; yet when nature takes the ???most powerful greenhouse gas??? out of the air such as in a desert or during a drought the temperature goes up and heat-waves ensue.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wattsupwiththat.com