PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Sulfur dioxide (SO2) is mainly emitted by the burning of fossil fuels such as crude oil and coal.
http://www.w3.org/ns/prov#wasQuotedFrom
  • thegoodairlady.com