Task: Question Generation
Input (English): Passage: Coming off their dominating home win over the Broncos, the Ravens flew to Paul Brown Stadium for a Week 9 AFC North rematch with the Cincinnati Bengals.  Baltimore would trail in the first quarter as Bengals quarterback Carson Palmer completed a 6-yard touchdown pass to wide receiver Andre Caldwell, followed by running back Cedric Benson getting a 1-yard touchdown run.  Cincinnati would increase their lead in the second quarter as kicker Shayne Graham booted a 23-yard field goal.  After a scoreless third quarter, the Ravens got on the board with a 2-yard touchdown run from running back Ray Rice.  However, the Bengals' defense would stop any further progress from Baltimore.
Output (English): How many touchdown passes were thrown in the game?