About: http://webisa.webdatacommons.org/290924212

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 positioning device, such as a spring, is mechanically coupled to the support assembly and arranged to retractably urge the first and second surfaces toward each other.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com