Complex sentence: In 1808, two Frenchmen are said to have fought in balloons over Paris, each attempting to shoot and puncture the other's balloon; one duellist is said to have been shot down and killed with his second.
Split into simpler sentences: In 1808, two Frenchmen are said to have fought in balloons over Paris, each attempting to shoot and puncture the other's balloon. One duellist is said to have been shot down and killed with his second.