About: http://webisa.webdatacommons.org/159393470

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 bowed sleeve 20 or 40 on which the shutter elements 50 are disposed comprises a translucent material such as acetate or vellum with opaque lines disposed thereon comprising the shutter elements 50.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com