context:  Entering their second game of the season against Baltimore, the Steelers' defense ranked first in the league, while the Ravens' defense ranked second. "We're going to win by any means necessary. If the defense has to score, if the special teams have to kick in a score, or if the offense has to score 50 points - whatever it takes to win," stated James Harrison prior to the game. Both teams were held scoreless before a record crowd at M&T Bank Stadium until a Baltimore field goal gave the Ravens a 3-0 lead at 12:34 of the second quarter. Pittsburgh tied the game on a Jeff Reed field goal; Matt Stover converted a second time to give the Ravens a three-point lead at halftime. Stover kicked his third field goal of the game in the third quarter, extending their lead to six points. In the final quarter, Reed kicked his second field goal of the game to put the Steelers within three points. On the Steelers final drive of the game, the offense drove 92&#160;yards over 2:53, with Ben Roethlisberger completing a touchdown pass to Santonio Holmes with 50&#160;seconds remaining. The Ravens embarked on one more drive, but the Steelers second interception of the game prevented them from scoring. With the victory the Steelers won their second consecutive AFC North title and clinched a first round bye and became the first AFC franchise to amass 550&#160;wins.
question: How many field goals were scored in the first half?
answer: 3