About: http://webisa.webdatacommons.org/128731388

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	We already know that the head of the sequence is type A and so I can not think of how B could be anything other than equal to A. Can you provide an example where B is some super-type?
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com