About: http://webisa.webdatacommons.org/410092435

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 addition, a gas such as carbon dioxide, air, nitrogen or argon may be used as the blowing agent in a frothing process.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com