context:  Hoping to snap a five-game losing streak, the Broncos returned home for a game against the Houston Texans. In the first quarter, the Broncos trailed early, after a 3-yard touchdown run by Texans' running back Arian Foster, followed in the second quarter by a 3-yard touchdown pass from quarterback Matt Schaub to tight end Owen Daniels, and a 34-yard field goal by placekicker Neil Rackers, giving Houston a 17-0 halftime lead. The Broncos got on the board in the third quarter, with a 6-yard touchdown run by running back Correll Buckhalter, but the Texans responded, with a 54-yard field goal by Rackers. The Broncos cut into the Texans' lead, with a 27-yard field goal by placekicker Steven Hauschka, but a 57-yard field goal by Rackers gave Houston a 23-10 lead. In the fourth quarter, the Broncos staged a rally, with a 23-yard touchdown pass from quarterback Tim Tebow to Buckhalter, followed by Tebow scrambling for a 6-yard touchdown run, giving the Broncos a 24-23 lead with three minutes remaining. The Broncos' defense thwarted Houston's final drive.
question: How many touchdown passes did Schaub throw in the first half?
answer: 1