Given the task definition, example input & output, solve the new input case.
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Example: I've read this book with much expectation, it was very boring all through out the book
Output: Negative
Review writer does not like the book because it was boring, therefore it is a negative review.

New input case for you: So I've had this product since July 2011, and it is now in the trash. The seams do not hold up and 2 have released, creating giant 'bubbles' in the mattress rendering it unusable. I paid nearly $50 for this back then, and only used it 3 or 4 times. Very disappointed in the poor quality of this item.
Output:
Negative