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: I find this book highly useful as a desktop reference for just about anything HTML/DHTML related. In addition, Powell does a great job of introducing topics that may be new to some people, like XML.
A:
Positive