About: http://webisa.webdatacommons.org/436184132

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	The team assumed there were two types of squares, identical except for a 90-degree rotation, arranged as the black and red squares on a checkerboard.
http://www.w3.org/ns/prov#wasQuotedFrom	nextbigfuture.com