Complex sentence: While taking a break at the Babylon Club, Tony is attacked by assassins, but kills them all, one surviving assassin reveals that the Diaz Brothers have killed the only family connection Tony has left-his mother.
Split into simpler sentences: While taking a break at the Babylon Club, Tony is attacked by assassins, but kills them all. One surviving assassin reveals that the Diaz Brothers have killed the only family connection Tony has left-his mother.