<http://webisa.webdatacommons.org/prov/404614571> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/278773011> . <http://webisa.webdatacommons.org/278773011> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/278773011> <http://www.w3.org/ns/prov#value> "Other gases which may be used are ethylene or other hydrocarbons, halogenated hydrocarbons, nitrogen, or the noble gases including helium and argon." . <http://webisa.webdatacommons.org/278773011> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/99851520> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/278773011> .