About: http://webisa.webdatacommons.org/188357686

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	For the sake of simple explanation, it is premised as environmental conditions that a light source is a parallel light source and the surface of an object serves as a perfectly diffuse reflector.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk