Task: Question Generation
Input (English): Passage: The Bengals' home opener was against the Chargers.  In the first quarter, Andy Dalton found A. J. Green on a 16-yard pass for a 7-0 lead.  The Chargers would later on score when Josh Lambo kicked a 40-yard field goal for a 7-3 game.  They drew closer in the second quarter, when Lambo kicked another field goal from 32 yards out for a 7-6 game.  The Bengals moved ahead by 8 when Andy Dalton found Marvin Jones on a 45-yard pass for a 14-6 game at halftime.  In the third quarter, the Chargers once again came within a point when Philip Rivers found Stevie Johnson on a 10-yard pass for a 14-13 game.  The Bengals pulled ahead by 4 when Mike Nugent kicked a 21-yard field goal for a 17-13 game.  In the fourth quarter, Dalton found Tyler Eifert on a 9-yard pass for a 24-13 lead.  The Chargers would come within 5 as Rivers found Malcolm Floyd on a 40-yard pass for a 24-19 game.  After pressuring the Bengals' offense, the Chargers got the ball back.  Though one of Rivers's comeback passes was picked off sealing the win for the Bengals.
Output (English): Which team was leading at halftime?