About: http://webisa.webdatacommons.org/268669893

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	In this manner, the image data at the boundary portions are expressed by the use of intermediate grey level data, while the portions other than the boundary portions are expressed by the bi-level image data.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk