About: http://webisa.webdatacommons.org/270293778

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	Oxygen, nitrogen, mixtures of oxygen and nitrogen, and gaseous compounds of oxygen and nitrogen, such as nitrous oxide, are preferred but other reactive gases are possible.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk