Complex sentence: The following year he rode in the 250cc four-stroke endurance world championship in Finland, gaining eighth place, and finished 10th overall in the 500cc four-stroke category in the same event in 2003.
Split into simpler sentences: The following year he rode in the 250cc four-stroke endurance world championship in Finland, gaining 8th place. He finished tenth overall in the 500cc four-stroke category in the same event in 2003.