PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Water vapor is a stronger greenhouse gas than CO2 and its concentration in the air is between 25 and 50 times greater than CO2.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wattsupwiththat.com