Complex sentence: The archaeological evidence from Bologna and its vicinity contradicts the testimony of Polybius and Livy on some points, who say the Boii expelled the Etruscans and perhaps some were forced to leave.
Split into simpler sentences: The archaeological evidence from Bologna and its vicinity contradicts the testimony of Polybius and Livy on some points. They say the Boii expelled the Etruscans and perhaps some were forced to leave.