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: This book lacks the depth it seems to promise. Some of the illustrations are lacking. There is not enough meat to help anyone with special needs learners. I would suggest you look elsewhere. I was greatly disappointed since the majority of work by Jensen is wonderful.
Solution:
Negative