About: http://webisa.webdatacommons.org/421986076

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	In the alternative, subsequent to evacuation, an inert gas, such as carbon dioxide or nitrogen, at atmospheric pressure may be introduced.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com