About: http://webisa.webdatacommons.org/225827546

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	While an environment of pure oxygen is preferred, the oxygen may be doped with other gases such as argon, carbon dioxide, nitrogen or mixtures thereof for economic or safety considerations.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca