About: http://webisa.webdatacommons.org/353994394

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	For this reason, one of the gases is always O2, or alternatively, in the most simplified one gas source devices, is air.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com