About: http://webisa.webdatacommons.org/376637162

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	Upon cooling to ambient temperature, valve 2 is closed and a noble gas such as Ar, He, Ne, Kr, Rn or Xe, or other gases which will not react with the alkali metal coating can be admitted to the chamber 1 through control valve 15.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca