About: http://webisa.webdatacommons.org/57144161

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	A reflecting film, formed of a metallic material such as aluminum, gold, or chromium, is formed on that side of the substrate 31 on which the gratings 32 are arranged.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com