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:
This is quite simply the worst story i have ever read in my life.It was depressing, LONG, and meandered its way aimlessly till the end. Whats worse, the book could have ended half way and still had the same impact. The character still meets the same fate, everyone would have felt the same way, and the reader would have been spared several chapters of agonizing reading had she made a different choice after confessing her secret to Angel.If you like reading a depressing story where it seems like the author is taking sadistic joy in tormenting the protagonist, this is the story for you. For everyone else, stay far far away.
Answer:
Negative