About: http://webisa.webdatacommons.org/366760908

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	Another way of incorporating a gas into the core mixture is through the use of foaming agents which produce a gas (usually a gas such as nitrogen or carbon dioxide) during the extrusion process.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr