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 is a book that will tug at your heartstrings. I found myself turning the pages feeling the authors pain, joy and sadness.This is a unique style of writing, and maybe it would have worked well for a novel, but the author told it the way he felt it, and the poetry works in conveying what he wanted to say! I recommend it to anyone that has been in a similiar situation and hope that it can help then understand what they have been through, and maybe help them resolve their past.The only down side to the book is that I would have liked to read more. There are only 97 pages of actual poetry, and the author's own words, which I found to be very profound. Maybe the author's next book will be longer. I look forward to reading more of his work.
Solution:
Positive