Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example is below.
Q: I've read this book with much expectation, it was very boring all through out the book
A: Negative
Rationale: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: This book is getting mixed reviews. It seems like friends of the author say its great. Those who tried to actually use the book are disappointed that everything is so out of date. This edition was not updated since the first edition and is now really out of date. Things change, but sloppy research is always out of style.
A:
Negative