Coming off their upset road win over the Broncos, the Raiders went home for a Week 13 AFC West rematch with the Kansas City Chiefs. In the first quarter, Oakland struck first as kicker Sebastian Janikowski got a 25-yard field goal. The Chiefs would respond with kicker Connor Barth getting a 38-yard field goal. In the second quarter, Kansas City took the lead as CB Maurice Leggett returned a fumble (who was from a trick play on a field goal attempt) 67 yards for a touchdown. In the third quarter, Oakland responded with RB Justin Fargas getting a 1-yard TD run. In the fourth quarter, the Chiefs replied with RB Larry Johnson getting a 2-yard TD run, along with Barth making a 27-yard field goal. The Raiders tried to come back as Janikowski nailed a 51-yard field goal, but Kansas City's defense was too much to overcome.

Based on the above article, answer a question. How many field goals were kicked in the first half?
2