Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
Please note that the format of the Chemical PE exam will change somewhat starting in April 2011. This sample exam is based on the old format that was used until October 2010. The problems are still helpful when practicing for the exam, but this book has no longer the same "look and feel" as the new exam. NCEES has a new sample exam book out that matches the new exam specifications and can be ordered from the NCEES website.
Answer:
Positive