Hoping to rebound from their loss against the Steelers, the Titans went home for their Week 2 home opener against their AFC South foe, the Houston Texans.  Tennessee would strike first in the opening quarter as running back Chris Johnson got a 57-yard touchdown run.  The Texans would answer with quarterback Matt Schaub completing a 19-yard touchdown pass to wide receiver Andre Johnson, yet the Titans would reply with quarterback Kerry Collins completing a 69-yard touchdown pass to Johnson.  Tennessee would add onto their lead in the second quarter as Collins completed an 8-yard touchdown pass to wide receiver Nate Washington.  However, Houston took the lead as Schaub completed a 72-yard touchdown pass to Johnson and a 29-yard touchdown pass to Jacoby Jones, followed by a 38-yard field goal from kicker Kris Brown.  The Titans would close out the half as kicker Rob Bironas made a 40-yard field goal. In the third quarter, Tennessee would regain the lead as Johnson got a 91-yard touchdown run.  The Texans would tie the game again as Schaub completed a 1-yard touchdown pass to tight end Owen Daniels.  In the fourth quarter, Houston took the lead as Brown nailed a 23-yard field goal.  Afterwards, the Texans' defense prevented any attempt at an offensive rally.
How many yards long, to the nearest integer, was the average touchdown in the first half?
42