About: http://webisa.webdatacommons.org/284811014

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	BUt if "unknown" is a classification or a kind of value, then once somehting is "unknown" it has to stay "unknown".
http://www.w3.org/ns/prov#wasQuotedFrom	w3.org