Complex sentence: Obi-Wan's Padawan apprentice, who has grown into a powerful but arrogant Jedi in the ten years since "The Phantom Menace" and is believed to be the "chosen one" of Jedi prophecy destined "to bring balance to the Force".
Split into simpler sentences: Obi-Wan's Padawan apprentice, who has grown into a powerful but arrogant Jedi in the ten years since "The Phantom Menace". He is believed to be the "chosen one" of Jedi prophecy destined "to bring balance to the Force".