About: http://webisa.webdatacommons.org/113878210

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	To this end I combine with a photographic camera, a mirror or other reflector, which is preferably mounted directly in front of the camera, and provided with an aperture in line with the lens of the camera.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com