PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, as much as carbon emissions remain the most controversial of all the emmissions of gases, there are some other gases such as methane and water vapour ( due to high rate of evaporation) that are still a cause of concern to humanity, mostly because of the fact that they are classified as green house gases".
http://www.w3.org/ns/prov#wasQuotedFrom
  • heepi.org.uk