About: http://webisa.webdatacommons.org/268378336

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	I guess your proof has yet to surface, but the above examples of sightings or signs is a start.
http://www.w3.org/ns/prov#wasQuotedFrom	mtbr.com