Complex sentence: On his last appearance, Sadler's Wells was sent to Longchamp in October for the Prix de l'Arc de Triomphe, but ran disappointingly: after being among the leaders on the turn into the straight, he faded to finish eighth behind Sagace.
Split into simpler sentences: On his last appearance, Sadler's Wells was sent to Longchamp in October for the Prix de l'Arc de Triomphe. After being among the leaders on the turn into the straight, he faded to finish eighth behind Sagace.