About: http://webisa.webdatacommons.org/207933425

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 an optical recording/reproducing system comprises a light source, an optical system including lenses and mirrors, focusing and tracking mechanisms, and light detection elements.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com