Complex sentence: Plotinus (Greek:) (ca. CE 204/5--270) was a major philosopher of the ancient world who is widely considered the founder of Neoplatonism (along with his teacher Ammonius Saccas), an influential philosophy in Late Antiquity.
Split into simpler sentences: Plotinus (Greek:) (ca. CE 204/5--270) was a major philosopher of the ancient world. He is widely considered the founder of Neoplatonism (along with his teacher Ammonius Saccas), an influential philosophy in Late Antiquity.