About: http://webisa.webdatacommons.org/154232109

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	Two single acting VAST push switches or the VASI operate a hand, elbow, or other device in dual-action push-a-little, push-a-lot switch will two directions.
http://www.w3.org/ns/prov#wasQuotedFrom	duke.edu