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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
The movie version of this song is much better. The Mariah/Whitney version is simply just a screaming contest to see who can sing better. I admit the song is beautiful and touching, but it would have been better if one of them sung it instead of it being a competition. Buy the soundtrack and listen to the movie version. It showcases the song in a much better light.
Answer:
Negative