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:
3D is all about pop outs gimmicks which is all missing here there is depth but average not that great. The movie & audio both are great but everybody was anticipating one of the best 3d blurays which is not the case. There are many other movies like Resident evil Final destination 4 & 5 and many others which have awesome 3d effects. If you have already bought the 2d version do not regret.
Answer:
Negative