About: http://webisa.webdatacommons.org/2815007

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	Such a gas is preferably nitrogen, but can comprise other gases, such as air, carbon dioxide, carbon monoxide, ethane, methane, flue gas, fuel gas, or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es