About: http://webisa.webdatacommons.org/165774790

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	Nitrogen gas is introduced for the purpose of maintaining a relatively constant driving pressure for any gas cap produced by the injected gas, e.g. carbon dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com