About: http://webisa.webdatacommons.org/21127706

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	When necessary, optical elements such as lenses may be used to couple light into an optical fiber or to couple light from a fiber to a light detector.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com