About: http://webisa.webdatacommons.org/122067500

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	Unfortunately, this author has seen examples of mechanics -- unaware the these subtleties -- mixing fasteners at will -- gee, if it screws on it must be okay..!! (Scary thought).
http://www.w3.org/ns/prov#wasQuotedFrom	enginehistory.org