About: http://webisa.webdatacommons.org/165907342

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 can only guess that the problem is related to some sort of index corruption - maybe it gets out of sync with the actual data store.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com