Complex sentence: By the Postclassic, various Nahua groups had moved into the "Altiplano"; the Tlahuicas founded nearby Cuauhnahuac (Cuernavaca) and Teopanzolco itself.
Split into simpler sentences: By the Postclassic, various Nahua groups had moved into the "Altiplano". The Tlahuicas founded nearby Cuauhnahuac (Cuernavaca) and Teopanzolco itself.