Task: Question Answering
Input (English): Passage: Having lost Matt Cassel for the season, the Vikings gave Teddy Bridgewater his first career start at home to the Falcons in week 4, but it was running back Matt Asiata who opened the scoring with a 3-yard touchdown run. Roddy White leveled the scores with a 24-yard catch from Matt Ryan, but a 49-yard kickoff return from Cordarrelle Patterson set the Vikings up with a short field on the next drive, which Asiata finished with a 6-yard run to restore Minnesota's seven-point lead. Steven Jackson thought he had tied the scores again on a 3-yard run with six minutes to go in the half, only for the touchdown call to be overturned on review; however, Ryan was able to find FB Patrick DiMarco in the flat on the next play. However, Bridgewater himself restored Minnesota's advantage on the ensuing possession, capping an 80-yard drive with a 13-yard touchdown run as the game entered its first two-minute warning. After forcing Atlanta into a quick three-and-out, Bridgewater led the Vikings downfield to the brink of another touchdown, but a lack of time meant they had to settle for an 18-yard Blair Walsh field goal to give them a 24-14 lead at the half. Walsh scored another field goal on the opening drive of the second half, but long touchdowns for Devin Hester and Antone Smith gave the Falcons a one-point lead going into the fourth quarter. Those would prove to be Atlanta's last points of the game as Asiata picked up his third TD run early in the fourth quarter, with Bridgewater adding two points with a pass to Rhett Ellison. Bridgewater was injured on that drive, meaning that third-string QB Christian Ponder came in for his first appearance of the season. However, his job was simply to hand the ball off to rookie running back Jerick McKinnon, who set up a 55-yard field goal attempt for Walsh. An interception by Harrison Smith led to another field goal from 33 yards, before Josh Robinson closed the game out with another interception. 
Question: How many field goals did Blair Walsh kick? 
Answer type: Number 
Output (English): 3.