Task: Question Answering
Input (English): Passage: Hoping to rebound from their road loss to the Jets and save their season, the Vikings went home for a Week 6 duel with the Dallas Cowboys, in a rematch of last year's Divisional Playoff game, won 34-3 by the Vikings. Minnesota trailed in the first quarter as Cowboys quarterback Tony Romo completed a 15-yard touchdown pass to wide receiver Roy Williams. The Vikings answered with quarterback Brett Favre finding wide receiver Greg Camarillo on a 10-yard touchdown pass. Dallas struck back in the second quarter as Romo found Williams again on a 2-yard touchdown pass. Minnesota took the lead in the third quarter as wide receiver Percy Harvin returned the half's opening kickoff 95 yards for a touchdown, followed by a 1-yard touchdown run from running back Adrian Peterson. The Cowboys tied the game in the fourth quarter as Romo threw a 31-yard touchdown pass to wide receiver Dez Bryant. Afterwards, the Vikings closed out the game as kicker Ryan Longwell booted a 38-yard field goal. 
Question: how many yards did romo throw? 
Answer type: Number 
Output (English): 31.