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: Come on people! Even Jack Vance's zany Dying Earth novels (Cugel in particular) have more substance than this lackadaisical tour-de-force. Skip out on Burroughs, if you want quality sci-fi read the Demon Princes by Jack Vance...
Solution:
Negative