Context:  After a tough loss at home, the Steelers traveled to Houston to take on the Texans. In the first quarter, it was all Steelers when Chris Boswell kicked a 34-yard field goal to make it 3-0. They would then make it 10-0 when Ben Roethlisberger found Justin Hunter on a 5-yard pass. In the second quarter, the Steelers would increase their lead when Roosevelt Nix ran for a 1-yard touchdown followed up by Boswell kicking a 36-yard field goal to make it 17-0 and then 20-0 at halftime. In the third quarter, the Steelers continued their dominance when Le'Veon Bell ran for a 10-yard touchdown to make it 27-0. In the fourth quarter, the Texans finally got on the board when T. J. Yates found DeAndre Hopkins on a 3-yard pass (with a failed 2-point conversion) to make it 27-6. The Steelers were able to seal the game when Roethlisberger found JuJu Smith-Schuster on an 18-yard pass to make the final score 34-6. With the win, the Steelers improved to 12-3, marking the tenth 12-win season in franchise history. With the Jaguars' loss to the 49ers on Sunday, the team was able to clinch a first-round bye in the AFC playoffs. The team also finished the regular season at 7-1 on the road for only the fourth time in franchise history (1978, 2004, 2010).

Question: How many touchdowns rushing touchdowns did the Steelers have before the fourth quarter?

Answer:
2