PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Known contributors to odor fade problems include new pipe installation (both steel and plastic), substances within the pipe such as oxidation (rust) or natural gas liquids, and little or no gas flow over an extended period of time.
http://www.w3.org/ns/prov#wasQuotedFrom
  • natfuel.com