PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Some of the problems associated with fluorine can likely be addressed by using dilute streams of HF (e.g., HF gas carried by helium, nitrogen, or other diluent).
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.co.uk