About: http://webisa.webdatacommons.org/64880440

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	where ?? is a wavelength of light incident upon the screen from the display, n is an integer, d is the film thickness of the first biaxially birefringent film, and ??nxy is the in-plane birefringence.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com