About: http://webisa.webdatacommons.org/15472958

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	Why can not I downcast a map to a type it is key is a subtype of the original map's key
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com