About: http://webisa.webdatacommons.org/23925204

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	By viewing several angles at the same time, several squares (or rectangles or other shape) will appear dark at the same time, allowing the coding and decoding of a unique, predetermined pattern.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com