PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Many techniques are used to mitigate this condition, including velocity strings, surfactants, various types of pumps and gas lift, among others.
http://www.w3.org/ns/prov#wasQuotedFrom
  • worldoil.com