About: http://webisa.webdatacommons.org/163621572

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 one preferred embodiment, the active device of an interface is a ball and the sensor is capable of detecting motion of the ball in at least two directions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com