About: http://webisa.webdatacommons.org/22632318

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	The following is an attempt to succinctly summarise the solution in the Hart, Kahn, and Kahn paper that MJD indicated, so I claim no originality for the solution.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com