Generate a question that has the following answer: Obi-Wan. for the following movie plot: During a space battle over the planet Coruscant, Jedi Knights Obi-Wan Kenobi and Anakin Skywalker lead a mission to rescue the kidnapped Supreme Chancellor Palpatine from Separatist commander General Grievous. After infiltrating Grievous's flagship, the Jedi battle the Sith Lord Count Dooku. Anakin subdues Dooku and, on Palpatine's urging, kills him. Grievous flees the battle-torn cruiser, which the Jedi crash-land on Coruscant. There, Anakin reunites with his wife, Padme Amidala, who reveals she is pregnant. While initially excited, Anakin begins to have prophetic visions of Padme dying in childbirth, and his worry steadily grows. Palpatine appoints Anakin to the Jedi Council as his representative, but the Council refuses to grant Anakin the rank of Jedi Master and orders him to spy on Palpatine, which diminishes Anakin's faith in the Jedi. Palpatine tantalizes Anakin with secret knowledge of the dark side of the Force, including the power to save his loved ones from dying. Meanwhile, Obi-Wan is dispatched to the planet Utapau to deal with General Grievous, and Yoda is dispatched to Kashyyyk to defend the planet from invasion. Tempting Anakin, Palpatine eventually reveals that he is the Sith Lord Darth Sidious, saying that only he has the knowledge to save Padme from dying. Anakin reports Palpatine's treachery to Mace Windu, who confronts and subdues the Sith Lord. Fearing that he will lose Padme, Anakin intervenes on Palpatine's behalf, allowing Palpatine to kill Windu. Anakin pledges himself to Palpatine, who dubs him Darth Vader. Palpatine issues an order for the clone troopers to kill their Jedi commanders and dispatches Vader and a legion of clones to kill everyone in the Jedi Temple. Vader massacres the remaining Separatist leaders hiding on the volcanic planet Mustafar, while Palpatine addresses the Senate, transforming the Republic into the Galactic Empire and declaring himself Emperor. Having survived the attack, Obi-Wan and Yoda return to Coruscant and uncover Anakin's treachery. Unable to...
Who Defeats Vader?