About: http://webisa.webdatacommons.org/213107230

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	Alternatively, the pressure source can be a mechanical device, such as a spring or other compressible member, or a shape-memory metal alloy.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com