About: http://webisa.webdatacommons.org/260776411

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	My experience is that simpler code is much easier to debug, so I figure maybe a good first step would be to simplify your code. (This is a good idea even if the simplification does not in itself fix the bug.)
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com