Context: Hoping to rebound from their Week 3 road loss to the Raiders, the Jets flew to M&T Bank Stadium for a Week 4 Sunday night battle with the Baltimore Ravens.  New York trailed early in the first quarter with Ravens linebacker Jameel McClain returning a fumble 6 yards for a touchdown. The Jets would respond with running back Joe McKnight returning a kickoff 107 yards for a touchdown. Baltimore would regain the lead with kicker Billy Cundiff getting a 38-yard field goal, followed by running back Ray Rice getting a 3-yard touchdown run. The Ravens added onto their lead in the second quarter with Cundiff making another 38-yard field goal, followed by linebacker Jarret Johnson returning a fumble 26 yards for a touchdown. New York responded with linebacker David Harris returning an interception 36 yards for a touchdown, followed by a 40-yard field goal from kicker Nick Folk. Baltimore came right back in the third quarter with cornerback Lardarius Webb returning an interception 73 yards for a touchdown. From there, the Ravens' defense prevented any comeback attempt.

Question: How many touchdowns did the Ravens defense score?

Answer:
2