PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Moreover, CO is a product of fossil fuel and biomass burning, is poisonous at higher concentrations, and it is estimated about 50% of the atmospheric CO is currently of manmade origin.
http://www.w3.org/ns/prov#wasQuotedFrom
  • environmental-expert.com