About: http://webisa.webdatacommons.org/51497405

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 casing may be of a rigid material such as polyethylene, polypropylene, polystyrene and the like, and is preferably of a non-reflective color.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com