About: http://webisa.webdatacommons.org/180591204

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 bearings 2516 are made of a hard material, such as ruby, ceramic (zirconia), or stainless steel, thereby providing long lasting, low friction supports for the ball 2502.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr