PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The more high-resolution records of, say, the little gases that are trapped in there that cause global warming, such as carbon dioxide and methane and nitrous oxide and so on - those show that we are in an unprecedented period, of very high levels of carbon dioxide and heat-trapping gases, than we have ever seen over the past 650,000 years.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com