Complex sentence: Kota arrives with his men, and tells Starkiller not to kill Vader: he wants to interrogate the Sith Lord for the Empire's secrets, then put him on trial, and then later execute him.
Split into simpler sentences: Kota arrives with his men, and tells Starkiller not to kill Vader. He wants to interrogate the Sith Lord for the Empire's secrets, then put him on trial, and then later execute him.