Task: Question Answering
Input (English): Passage: The Falcons returned home to take on the last of their AFC Opponents. Coming back home they are 3-0 against the AFC West. However, for the 3rd straight week, the team would trail a game as the Raiders moved ahead after Sebastian Janikowski's 53-yard field goal for the only score of the first quarter. The Falcons however took the lead with Matt Ryan finding Roddy White on a 4-yard pass to move up 7-3. However, the Raiders would come within a point with Janikowski kicking a 22-yard field goal and then retook the lead with Carson Palmer's 25-yard touchdown pass to Denarius Moore for a 13-7 halftime lead. After the break, the Falcons were able to score 13 unanswered points. First, Bryant kicked 2 field goals from 41 and 20 yards tie the game at 13-13. Then, In the fourth quarter, they took the lead after Asante Samuel returned an interception from 79 yards out for a touchdown to make the score 20-13. The Raiders however were able to make up for this mistake as Carson Palmer drove them down the field and Darren McFadden ran a touchdown in from 2 yards out to tie the game at 20-20. However, again the Falcons were able to complete the comeback as Bryant nailed a 55-yard field goal with 0:01 left to make the final score 23-20 With the win, the Falcons go into their bye week with their first ever 6-0 start to a season. They also finish the season 4-0 against the AFC West and with the Texans' loss to the Packers on Sunday Night, they remain the NFL's only undefeated team. 
Question: How many points were scored in the first half? 
Answer type: Number 
Output (English): 20.