About: http://webisa.webdatacommons.org/198197216

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	Screws such as 46, having their heads slidable in the wider portion of the slot and theirshanks in the narrower portion thereof, engage the plate 14 with their threaded ends 47.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com