PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Trees absorb pollutants such as nitrogen dioxide, carbon monoxide, ozone, and particulate matter from the atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom
  • forestsforwatersheds.org