About: http://webisa.webdatacommons.org/339232015

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	Air is the preferred gas primarily for cost and availability reasons, but other gases, such as carbon dioxide, may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk