About: http://webisa.webdatacommons.org/5008616

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	A check valve 56 assures that propane, acetylene, or other welding gases are not allowed to enter the primary product storage tank 46.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com