Task: Question Answering
Input (English): Passage: In week 15, the Lions donned brand new all gray uniforms and hosted a Saturday evening rematch with their division rivals, the Chicago Bears. The Lions opened the scoring in the first quarter via a 48-yard field goal from Matt Prater. The Lions extended their lead in the second quarter via a 31-yard field goal from Prater, and a three-yard touchdown pass from Matthew Stafford to T. J. Jones. The Bears got on the board via a 41-yard field goal from Mike Nugent with two seconds remaining in the first half, to make the score 13-3 in favor of Detroit at half-time. The Lions scored the only points in the third quarter via an eight-yard touchdown pass from Stafford to Eric Ebron. The Bears scored the only points in the fourth quarter via a nine-yard touchdown pass from Mitchell Trubisky to Benny Cunningham, making the final score 20-10 in favor of Detroit. 
Question: How many field goals did Matt Prater have before half-time? 
Answer type: Number 
Output (English): 2.