context:  Coming off their road win over the Eagles, the Seahawks went home for a Week 14 NFC West rematch with the Arizona Cardinals.  In the first quarter, Seattle took flight early with kicker Josh Brown getting a 23-yard field goal, while QB Matt Hasselbeck completed a 7-yard TD pass to WR Nate Burleson.  In the second quarter, the Seahawks increased their lead with Hasselbeck completing a 15-yard TD pass to WR Bobby Engram and a 17-yard TD pass to WR Deion Branch.  The Cardinals would get on the board as QB Kurt Warner completed a 5-yard TD pass to WR Bryant Johnson.  Seattle would end the half with Brown kicking a 41-yard field goal. In the third quarter, Arizona was starting to make a comeback as Warner completed a 2-yard TD pass to WR Jerheme Urban for the only score of the period.  In the fourth quarter, the 'Hawks pulled away as Hasselbeck completed a 3-yard TD pass to TE Marcus Pollard, RB Josh Scobey tackled Cardinals punter Mitch Berger in his endzone for a safety, and CB Marcus Trufant returned an interception 84 yards for a touchdown (with a failed PAT).  Arizona tried to mount a comeback as Warner completed an 11-yard TD pass to WR Larry Fitzgerald.  Fortunately, Seattle's defense prevented any hopes of a Cardinal comeback from happening. With the win, not only did the Seahawks improve to 9-4, but they also cliched their 4th-straight NFC West title.
question: How many touchdowns were scored in the first half?
answer: 4