Complex sentence: Year 349 BC was a year of the pre-Julian Roman calendar.In the Roman Empire it was known as the Year of the Consulship of Camillus and Crassus (or, less frequently, year 405 "Ab urbe condita").
Split into simpler sentences: Year 349 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Camillus and Crassus (or, less frequently, year 405 "Ab urbe condita").