About: http://webisa.webdatacommons.org/288082342

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	The lower part of the circles constitutes the wear surface, i.e. the surface which is in contact with the surface.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr