About: http://webisa.webdatacommons.org/177024451

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	An optical element includes a transparent material including a first surface and a second surface opposite the first surface.
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org