Task: Question Generation
Input (English): Passage: Coming off their bye week, the Chargers went home for a Week 10 AFC West duel with the Kansas City Chiefs.  In the first quarter, San Diego trailed early as Chiefs QB Tyler Thigpen completed a 30-yard TD pass to WR Mark Bradley.  In the second quarter, the 'Bolts got on the board as kicker Nate Kaeding got a 34-yard and a 26-yard field goal.  Kansas City would close out the half as Thigpen completed a 34-yard TD pass to TE Tony Gonzalez (with a failed 2-point conversion). In the third quarter, the Chargers tied the game as QB Philip Rivers completed a 5-yard TD pass to WR Malcom Floyd.  In the fourth quarter, San Diego took the lead as Rivers completed an 8-yard TD pass to TE Antonio Gates.  The Chiefs tried to rally as Thigpen completed a 3-yard TD pass to Gonzalez after a very controversial Pass Interference call on Safety Clinton Hart, in which Gonzalez did not look for a flag, making the call even more controversial.  Fortunately, the Chargers' defense stopped both the 2-point conversion and the ensuing onside kick to preserve their much-needed victory.
Output (English): How many quarters had been played before Rivers threw a touchdown pass to Floyd?