About: http://webisa.webdatacommons.org/281817497

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	Your answer is a good starting point, especially the part about assertions and exceptions.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com