About: http://webisa.webdatacommons.org/180357654

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	This includes such combinations as ethane or propane and air which have been used as test gases or as peak shaving gases when the demand for pipeline gas exceeds the supply.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es