About: http://webisa.webdatacommons.org/193676274

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	Therefore, the inclined reflecting plane 2302A preferably had a mirror-finished reflection surface coated by a metal film, such as Al, Ag, etc., or a dielectric multi-layered film.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com