About: http://webisa.webdatacommons.org/439828270

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	A device for detecting and representing movements as claimed in claim 5, wherein the at least one optical sensor is a rotary movement sensor for detecting a rotary movement about an axis extending through the reference point.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com