About: http://webisa.webdatacommons.org/397597828

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	Also, optical elements other than the lenses illustrated, such as mirrors, prisms, or holographic optical elements, may be used to direct incident and/or emergent light.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com