About: http://webisa.webdatacommons.org/196972085

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 would guess that somewhere in that string is a character, possibly hidden, or maybe it is ?? which makes your parser crash.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com