About: http://webisa.webdatacommons.org/404063794

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	Assisting optical elements other than lenses may also be used to enhance the contrast of a display.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com