Definition: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Input: I have seen four 3D movies on my new 3D TV and this one has been the least exciting as far as its 3D effects. I was disappointed. I am amending this review after watching the movie again. While I did enjoy the 3D version, I felt the 3D effects were subpar. It is still enjoyable to watch and still has the 3D perspective. They don't send things protruding out at you like other 3D movies do. It doesn't have the WOW-factor that other 3D movies have had.
Output:
Negative