Task: Question Answering
Input (English): Passage: The Texans traveled to the RCA Dome for an AFC South battle with the Indianapolis Colts.  From the get-go, Houston trailed as opposing QB Peyton Manning threw a 10-yard TD pass to WR Brandon Stokley and a 21-yard pass to RB Joseph Addai in the first quarter.  In the second quarter, opposing Kicker Adam Vinatieri kicked a 39-yard field goal to further distance themselves from Houston.  The Texans would get a 43-yard field goal by Kicker Kris Brown, but Vinatieri also made a 43-yarder as time ran out in the half.  In the third quarter, the Colts continued to put the game out of reach with Peyton throwing a 15-yard TD pass to TE Bryan Fletcher and Vinatieri kicking a 38-yard field goal.  In the fourth quarter, Texans QB David Carr completed a 33-yard TD pass to TE Owen Daniels, but Indianapolis responded with RB Dominic Rhodes getting a 2-yard TD run.  Houston would get another TD on a 1-yard pass to TE Mark Bruener, but the Colts put the game away with RB Ran Carthon getting a 3-yard TD run.  After WR Andre Johnson provided Houston with a 10-yard TD pass, the Texans ending up losing their ninth straight contest against Indianapolis. 
Question: How many yards was the second longest touchdown pass? 
Answer type: Number 
Output (English): 21.