About: http://webisa.webdatacommons.org/140446810

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	In the simplest form, an extension assist is a spring that is compressed during knee flexion in initial swing, uncoils during late swing, and propels the shank into full extension, thereby reducing the effort expended by the amputee.
http://www.w3.org/ns/prov#wasQuotedFrom	oandplibrary.org