# bad: re-used BNode label after OPTIONAL
# $Id: syn-bad-OPT-breaks-BGP.rq,v 1.1 2007/02/15 15:14:31 eric Exp $

PREFIX : <http://example.org/>
SELECT *
WHERE
{
  _:a ?p ?v . OPTIONAL { ?s ?p ?v } _:a ?q 1
}