About: http://webisa.webdatacommons.org/137040578

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	In a preferred embodiment, the closure means 5 is formed of a resilient material, such as butyl rubber, and is shaped in the form of a disk 5 with one or more projecting blades 8 extending therefrom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com