Complex sentence: His views were condemned in a Synod at Alexandria, under Athanasius of Alexandria, in 362, and later subdivided into several different heresies, the main ones of which were the Polemians and the Antidicomarianites.
Split into simpler sentences: His views were condemned in a Synod at Alexandria, under Athanasius of Alexandria, in 362. It was subdivided into several different heresies, the main ones of which were the Polemians and the Antidicomarianites.