PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For example, nitrogen oxides can react with volatile organic compounds in the atmosphere to form smog, which is known to increase respiratory problems in humans and carbon dioxide is a greenhouse gas" that contributes to global warming.
http://www.w3.org/ns/prov#wasQuotedFrom
  • environmentalchemistry.com