PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The gas mixture is then run through our helium enrichment unit, which opened in 2004, where the natural gas, helium, and other byproducts are separated.
http://www.w3.org/ns/prov#wasQuotedFrom
  • blm.gov