About: http://webisa.webdatacommons.org/238227217

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	Sensors 50, 52 are preferably tape switches, however, pneumatic tubes, piezoelectric sensing elements, and other types of pressure sensing devices could be effectively used to sense pressure applied to running surface 14 by user 16.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com