About: http://webisa.webdatacommons.org/318669839

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	Such plugs may be made of any suitable material, for example synthetic resin, composition, Celluloid, wood, vulcanite or metal or of hard material such as hardened steel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com