About: http://webisa.webdatacommons.org/18976966

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	If you need to see how this is accomplished, you may want to check out a package such as Gimp (it is an open image editor) - they have the algos to detect edges and choose by color.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com