PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, the greenhouse effect on Earth is mostly determined by water vapor and clouds, i.e., by atmospheric moisture, which is the main greenhouse substance.
http://www.w3.org/ns/prov#wasQuotedFrom
  • mongabay.com