About: http://webisa.webdatacommons.org/9563575

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 some embodiments, the surface is a sheet and the sheet may be free of pre-printed selectable elements such as printed letters or numbers (e.g., markings made before the user creates user-written selectable items on the sheet).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com