Complex sentence: Year 352 BC was a year of the pre-Julian Roman calendar.In the Roman Empire it was known as the Year of the Consulship of Poplicola and Rutilus (or, less frequently, year 402 "Ab urbe condita").
Split into simpler sentences: Year 352 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Poplicola and Rutilus (or, less frequently, year 402 "Ab urbe condita").