About: http://webisa.webdatacommons.org/163441300

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 the case of relative positioning devices, such as track balls or mouse devices, the user must be skillful in manipulating the track ball or mouse in space.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca