About: http://webisa.webdatacommons.org/279352423

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	Some might have wheels sticking out one side to contact a large shaft, with a cylindrical array of such blocks acting as a bearing or motor.
http://www.w3.org/ns/prov#wasQuotedFrom	typepad.com