Complex sentence: Palpatine is rescued by Jedi Knight Anakin Skywalker and Jedi Master Obi-Wan Kenobi, and a short duel ensues in which Anakin kills Dooku at Palpatine's insistence.
Split into simpler sentences: Palpatine is rescued by Jedi Knight Anakin Skywalker and Jedi Master Obi-Wan Kenobi, but not before the Jedi confront Count Dooku. A short duel ensues in which Anakin kills Dooku at Palpatine's insistence.