PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As recently as the 1970s, air pollutants such as sulfur oxides, nitrogen oxides and tiny, lung-clogging particulates were present in the air of both the United States and Japan at the same levels they are in China right now.
http://www.w3.org/ns/prov#wasQuotedFrom
  • businessinsider.com