Complex sentence: Sisyphus was the son of King Aeolus of Thessaly and Enarete, and the founder and first king of Ephyra (supposedly the original name of Corinth).
Split into simpler sentences: Sisyphus was the son of King Aeolus of Thessaly and Enarete. He was the founder and first king of Ephyra (supposedly the original name of Corinth).