About: http://webisa.webdatacommons.org/377869444

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	Optionally, an assist mechanism other than a counterweight can be used to provide upward movement of the first arm with minimal application of force by a subject.
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org