PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Carbon dioxide is a real gas, it is heavier than air and will always sink in the atmosphere if no other work is being done on it.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wattsupwiththat.com