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: I loved this book. The picture Jean Auel paints is of an ancient world in a time of change. She makes the characters real, you can sense and identify with their emotions. Hurry with that next book
Solution: Positive