About: http://webisa.webdatacommons.org/61592029

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	The expansion elements may be constructed of a material such as steel, spring steel, plastics or composites.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk