About: http://webisa.webdatacommons.org/18593556

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	Below is a proof of the key step, from my 2008/11/10 Ask an Algebraist post.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com