About: http://webisa.webdatacommons.org/318553574

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	As used herein, the term ???optical aperture??? refers to an opening, such as a hole, gap or slit through which light may pass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com