About: http://webisa.webdatacommons.org/31115710

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	Maybe you could go down that route?Or, if having them imagine a painting that then happens to be your 'latest addition to the gallery' is not your thing maybe work it backwards?
http://www.w3.org/ns/prov#wasQuotedFrom	penguinmagic.com