Write a question about the following article: The Ravens started their season at home against the Bengals.  They jumped out to a 3-0 lead in the first quarter with Justin Tucker's 46-yard field goal.  This was followed up by Ray Rice's 7-yard run to make the score 10-0.  The Bengals got on the board in the 2nd quarter with Mike Nugent's 34-yard field goal to shorten the lead to 10-3.  However, the Ravens were able to pull away as Joe Flacco found Anquan Boldin on a 34-yard touchdown pass to move ahead 17-3.  The Bengals responded coming within 7 when Benjarvus Green-Ellis ran for a 6-yard touchdown making the score 17-10 at halftime.  In the 3rd quarter, the Bengals were able to get within 4 points with Nugent kicking a 19-yard field goal shortening the Ravens' lead to 4 17-13.  However, the Ravens overpowered the Bengals scoring 27 unanswered points as Flacco found Dennis Pitta on a 10-yard pass to move ahead 24-13 followed up by Tucker scoring a 40-yard field goal moving them ahead 27-13.  This was followed by an Ed Reed interception that was returned 34 yards for a touchdown moving the team ahead 34-13.  In the 4th quarter, the Ravens scored again off of Rice's 1-yard run for a 41-13 lead and finished the game off of Tucker's 39-yard field goal to make the final score 44-13. Ed Reed returned an interception for a 34-yard touchdown, making Reed the all-time leader in career interception return yards with 1,497. The previous record of 1,483 yards was held by Rod Woodson.
How many touchdowns were scored during the first half?