Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Example Input: This product requires a stereo player in which the balance is turned totally to the left. Most auto systems have that capability. However if you have Dolby or SurroundSound, it can be difficult (and maybe impossible) to play the cassette without hearing two recordings at the same time. Unfortunately neither the packaging nor the website will warn you of the problem. You therefore should think before buying. Once you have opened the packaging you may be unable to return the product.
Example Output: Negative

Example Input: I thought this movie was boring and it didn't let you get to know any of the characters. The only good thing in this movie is a young, cute Mel Gibson.
Example Output: Negative

Example Input: For a fan of the old wood and fabric fighters of WWI, this film causes nothing but heartburn. The CGI effects are painfully bad, so obviously fake that it hurts to watch. And the scenes where they use actual airplanes, or recreations, are just as bad. What really bugged me was the fighters with fixed radial engines, rather than the rotaries they should have had. Forget about this film, and just read "Winged Victory" for the story by somebody who lived it. If you want to see the real airplanes fly, go to Rhinebeck, NY.
Example Output:
Negative