Complex sentence: Drivers who qualifed in an odd-number position competed in the first Duel along with the winner of the 2012 Daytona 500 pole and competitors who qualifed in even-numbered places took part in the second Duel.
Split into simpler sentences: Drivers who qualifed in odd-number positions competed in the first Duel along with the winner of the 2012 Daytona 500 pole. Competitors who qualifed in even-numbered places took part in the second Duel.