About: http://webisa.webdatacommons.org/182906183

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	Such holograms may be produced using a material such as photopolymer or silver halide, in which the refractive index may be varied by exposure to a holographically formed interference pattern.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com