Complex sentence: Lucius Tillius Cimber (died 42 BCE) was a Roman senator known as Metellus Cimber, one of the assassins of Julius Caesar and the one to give the signal for the attack on him.
Split into simpler sentences: Lucius Tillius Cimber (died 42 BCE) was a Roman senator. He was one of the assassins of Julius Caesar and the one to give the signal for the attack on him.