About: http://webisa.webdatacommons.org/136958823

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 want to create a cutout in a shape using a traditional mask, you actually have to create a shape on a mask layer that covers all the areas except the area you wish to cut out.
http://www.w3.org/ns/prov#wasQuotedFrom	wikibooks.org