About: http://webisa.webdatacommons.org/220393407

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	To this end, extension 18 is formed from a suitable strong and rigid material, such as metal, wood, or a suitable plastic.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk