About: http://webisa.webdatacommons.org/41452049

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 an exemplary embodiment of the invention, a pin attached to the ball, optionally part of the weight, is constrained to travel within a slot (e.g., a rectangle or other shape) defined in a guide plate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca