Complex sentence: Harry Gant won the race on a gas mileage gamble where he out ran Darrell Waltrip and Dale Earnhardt and ran out of gas after taking the checkered flag.
Split into simpler sentences: Harry Gant won the race on a gas-mileage gamble. He out-lasted Darrell Waltrip and Dale Earnhardt, and reportedly ran out of fuel right after taking the checkered flag.