Original sentence: Gaius Julius Caesar Augustus (23 September 63 BC – 19 August AD 14) was the second emperor of the Roman Empire, which he ruled alone from 27 BC until his death in AD 14
Edited sentence: Gaius Julius Caesar Augustus (23 September 63 BC – 19 August AD 14) was the first emperor of the Roman Empire, which he ruled alone from 27 BC until his death in AD 14