Complex sentence: Cassius Longinus was an Ancient Roman jurist, politician, grandnephew of Servius Sulpicius Rufus, decendant of Gaius Cassius Longinus, one of Caesar's assassins.
Split into simpler sentences: Cassius Longinus was an Ancient Roman jurist and politician. A grandnephew of Servius Sulpicius Rufus and descendant of Gaius Cassius Longinus, he was also one of Caesar's assassins.