About: http://webisa.webdatacommons.org/273332044

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 ball bearings 17 and 18 are standard spheres, common in devices such as watches, which are composed of gemstones such as sapphire, ruby or corundum.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca