About: http://webisa.webdatacommons.org/338878272

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 second optical system can include a light source, and a reflector including a first reflecting surface, a second reflecting surface, and a third reflecting surface.
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org