Complex sentence: Number 6 discovers from Number 2 that a mysterious Carnival is to be held; he also discovers a dead man's body, and using it as a buoy, attempts to send out a message to sea.
Split into simpler sentences: Number 6 discovers from Number 2 that a mysterious Carnival is to be held. He also discovers a dead man's body, and using it as a buoy, attempts to send out a message to sea.