About: http://webisa.webdatacommons.org/216579691

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	When a gaseous fluid, such as air or carbon dioxide, is pumped from a pressurized fluid source 8 into the cavity between the two sheets 2, 3 through valve 6 it is clear that the cavity will expand as the pressure therein increases.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com