About: http://webisa.webdatacommons.org/338471378

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	Thus a source of gas, for example CO2 or air source 32 is operatively connected to pump 30 by means of hand operated valve 34, gas pressure regulator 36 and conduit 38.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com