About: http://webisa.webdatacommons.org/214534144

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 first and second optical elements 24, 26 may be made from a variety of materials including glass and plastic.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com