prompt: What are some home remedies for teeth whitening?
chosen: What are some home remedies for teeth whitening?
chosen: user
chosen: 1. Lemon juice mixed with baking soda and applied directly to the teeth. 
  2. Baking soda and water paste to brush the teeth.
  3. Activated charcoal and hydrogen peroxide mixed and painted onto the teeth. 
  4. Salt water rinse. 
  5. Apple cider vinegar and baking soda gel.
chosen: assistant
rejected: What are some home remedies for teeth whitening?
rejected: user
rejected: assistant