About: http://webisa.webdatacommons.org/9413585

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	In under-pressurized zones and depleted or water-sensitive formations, gases such as nitrogen and carbon dioxide are being used in place of water.
http://www.w3.org/ns/prov#wasQuotedFrom	weldingandgasestoday.org