About: http://webisa.webdatacommons.org/437821581

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	It should be understood that in some cases the opaque regions may assume elliptical, rectangular, or other shapes as appropriate to adequately block regular patterns of the Fourier image.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca