Answer based on context:

at Invesco Field at Mile High, Denver, Colorado TV Time: ESPN 8:30pm eastern The Ravens suffered their first loss of the season as they were beaten 13-3 by the Denver Broncos.  In a defensive struggle most of the game, Steve McNair was intercepted three times and Jamal Lewis was held to 43 yards rushing. The Ravens got on the board first when Matt Stover kicked a 24-yard field goal, following a fumble by Broncos RB Tatum Bell. The Broncos responded with a 43-yard field goal of their own by Jason Elam. The Ravens drove deep into Broncos territory late at the end of the first half, but that drive was thwarted as Steve McNair was intercepted by Champ Bailey in the end zone on a pass intended for Clarence Moore. The third quarter saw no points scored by either team as the defensive struggle continued. The Broncos controlled the clock in the second half with the running game led by Tatum Bell, who atoned for his fumble in the first quarter, by bouncing back with 92 yards rushing. Ravens QB McNair was intercepted again by Darrent Williams, which led to a Jake Plummer to Rod Smith touchdown pass. McNair was intercepted a third time, ending the Ravens' final drive, this time by Domonique Foxworth. With their first loss, the Ravens dropped to 4-1.

How many touchdowns did the Ravens score?
1