给出一组电影名和其对应的演员列表，将演员列表中的重复项去掉。
- Movie 1: The Godfather
  Actors: Marlon Brando, Al Pacino, James Caan, Richard S. Castellano, Robert Duvall, Sterling Hayden, John Marley, Richard Conte
- Movie 2: The Shawshank Redemption
  Actors: Tim Robbins, Morgan Freeman, Bob Gunton
- Movie 1: The Godfather
  Actors: Marlon Brando, Al Pacino, James Caan, Richard S. Castellano, Robert Duvall, Sterling Hayden, John Marley, Richard Conte
- Movie 2: The Shawshank Redemption
  Actors: Tim Robbins, Morgan Freeman, Bob Gunton

去重后的演员列表：
- Marlon Brando, Al Pacino, James Caan, Richard S. Castellano, Robert Duvall, Sterling Hayden, John Marley, Richard Conte, Tim Robbins, Morgan Freeman, Bob Gunton