PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Sulphur is a contaminant of many fossil fuels ??? and once up the stack of a power station as sulphur dioxide to sulphurous acid and to sulphuric acid in the little droplets surrounding tiny cloud-forming particles.
http://www.w3.org/ns/prov#wasQuotedFrom
  • castlebar.ie