About: http://webisa.webdatacommons.org/75145105

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	This effect can be exploited by measuring the change in the differences between a pair of colors in response to a copying operation, such as an extra scan or print operation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com