Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example: I've read this book with much expectation, it was very boring all through out the book
Solution is here: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this: I must say I was required to read this book for a class. If that had not been the case, I would have put the book down half way through it. I was put off by the excessive amounts of technical language and graphic descriptions of the state of murder victims. Quite frankly, I was very disappointed by this book.
Solution:
Negative