About: http://webisa.webdatacommons.org/218201832

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	The gas is preferably argon or another monatomic gas, but other gases can be used, such as nitrogen, hydrogen or oxygen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com