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
Example solution: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Problem: This was an excellent book, probably my favorite of the first four. I read it when I was 11 years old, and have re-read it so many times the book is practically destroyed. However, this book, while I as a 6th grader enjoyed it, is not for the immature child. Think carefully before you tell anyone about the series, especially your child, because it contains a few explicit scenes, which increase as the books go on. Another word of advice- if you don't like a lot of details in a book, don't read this, because the author details surroundings and histories frequently. However, I thought the details were fascinating. Jean Auel is a wonderful writer, and I eagerly await the fifth book.
Solution: Positive