About: http://webisa.webdatacommons.org/296994496

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 shadow itself is an illusion, the checkerboard is painted to LOOK like there is a shadow when there really isn???t.
http://www.w3.org/ns/prov#wasQuotedFrom	discovermagazine.com