About: http://webisa.webdatacommons.org/359334404

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 alternatively embodiment of the invention, two or more joints having a shared center of rotation, are provided instead of a ball, for example a universal joint.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com