About: http://webisa.webdatacommons.org/397122712

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 have custom types String, Int, Double that all derives from a base object class. a.ToDouble() would actually return Double but I did override cast operator for Double that would actually return reference for the double.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com