Complex sentence: It was the 70th running of the Prix de l'Arc de Triomphe and was won by Suave Dancer, ridden by Cash Asmussen and trained by John Hammond.
Split into simpler sentences: It was the 70th running of the Prix de l'Arc de Triomphe, and it was won by Suave Dancer. The winner was ridden by Cash Asmussen and trained by John Hammond.