Complex sentence: Mark Donohue won the race leading only the final 13 laps, the third-lowest total in Indy history to that point (Joe Dawson led two laps in 1912, and Graham Hill led ten laps in 1966).
Split into simpler sentences: Mark Donohue won the race leading only the final 13 laps. The third-lowest total in Indy history to that point (Joe Dawson led two laps in 1912, and Graham Hill led ten laps in 1966).