About: http://webisa.webdatacommons.org/286710695

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 carrier gas such as hydrogen, oxygen, argon, helium or nitrogen is introduced at the lower level of a fluid column, travels up through, and exits the fluid surface into a headspace.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com