About: http://webisa.webdatacommons.org/421937544

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 the download for sketch.js there is an example (that sort of works but not with mousedown) that I have tried to manipulate with no joy.
http://www.w3.org/ns/prov#wasQuotedFrom	dreamincode.net