About: http://webisa.webdatacommons.org/239285482

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	Once a primary hopper is filled it is closed and purged with carbon dioxide or other inert gas, in order to expel air from the waste through a vent valve (not shown) to atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca