<http://webisa.webdatacommons.org/277462956> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/277462956> <http://www.w3.org/ns/prov#wasQuotedFrom> <sumobrain.com> . <http://webisa.webdatacommons.org/prov/99851520> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/277462956> . <http://webisa.webdatacommons.org/prov/404614572> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/277462956> . <http://webisa.webdatacommons.org/277462956> <http://www.w3.org/ns/prov#value> "In addition, nitrogen or a rare gas such as helium," .