Complex sentence: Throughout the duration of his speech Cicero does not attempt to convince the judges that Milo did not kill Clodius, but that the killing of Clodius was committed lawfully in self-defense.
Split into simpler sentences: Throughout the duration of his speech, Cicero does not even attempt to convince the judges that Milo did not kill Clodius. Cicero claims that the killing of Clodius was lawful and in self-defense.