About: http://webisa.webdatacommons.org/406037079

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	The method includes detecting whether liquid or gas is present at the level detectors, and opening and closing a clamp to vent gas.
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org