About: http://webisa.webdatacommons.org/85203142

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	Much simpler: NUL is a control code such as BEL, VT, HT, SOT etc. and thus has max. 3 characters.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com