Complex sentence: The earliest known form of Latin is Old Latin, which was spoken from the Roman Kingdom to the middle Republican period and is attested both in inscriptions and in some of the earliest extant Latin literary works, such as the comedies of Plautus and Terence.
Split into simpler sentences: The earliest known form of Latin is Old Latin, which was spoken from the Roman Kingdom to the middle of the Roman Republic period. It is attested both in inscriptions and in some of the earliest extant Latin literary works, such as the comedies of Plautus and Terence.