About: http://webisa.webdatacommons.org/275129518

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	Alternatively, the outer ring portion 521 comprises an organic polymer such as plastic or rubber.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com