PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Methane persists in the atmosphere only about a decade before breaking down into carbon dioxide, and other chemicals, but as a greenhouse gas it is 20 times more potent than carbon dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom
  • opednews.com