Complex sentence: Ovid's writing in the "Ars Amatoria" concerned the serious crime of adultery, and he may have been banished for these works which appeared subversive to the emperor's moral legislation.
Split into simpler sentences: Ovid's writing in the "Ars Amatoria" concerned the serious crime of adultery. He may have been banished for these works, which appeared subversive to the emperor's moral legislation.