Coming off their thrilling road win over the Ravens, the Bengals went home for a Week 6 duel with the Houston Texans.  Cincinnati would trail in the first quarter as Texans quarterback Matt Schaub hooked up with tight end Owen Daniels on a 12-yard touchdown pass.  The Bengals would get on the board in the second quarter with running back Cedric Benson's 10-yard touchdown run.  Houston would retake the lead with Schaub's 38-yard touchdown pass to running back Steve Slaton, yet Cincinnati would get the halftime lead with quarterback Carson Palmer's 8-yard touchdown pass to wide receiver Laveranues Coles and kicker Shayne Graham's 50-yard field goal. However, the Texans struck back in the third quarter as Schaub completed a 23-yard touchdown pass to wide receiver Jacoby Jones, followed by a 7-yard touchdown pass to Daniels.  Try as they might, the offense could not produce another miraculous win as Houston's defense held on for the win.

Answer this question based on the article: How many of the touchdowns were passing touchdowns?
5