PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Considerable difiiculty and inconvenience has been experienced with gas mains carrying natural gas. due to corrosion and interference of the dust therefrom with the proper functioning of pumps, valves, meters and other equipment.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com