PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Greenhouse gases such as carbon dioxide, water vapor, methane, nitrous oxide, and ozone, all contribute to the greenhouse effect, or the warming of Earth's atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom
  • newworldencyclopedia.org