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

Example Input: When I first heard Ra's "From Zero" I was in awe. A band that used cool effects, Egyptian scales, and was moderately heavy--the perfect mix for me. Then, Duality came out.Duality demonstrates a lack of creativity that was once there in Ra. I wouldn't say they evolved, I'd say they devoled. They still use effects, but rarely and they don't have as big of an impact. On top of that they hardly sound Egyption on the album. As for this album, Ra sounds more like other bands, but they are still distinct. I just wish they went in a different direction.I do want to say that their are some really awesome songs like Fallen Angels, Undertaken, and Taken. The other tracks are bad either, it's just that I expected a whole lot more.
Example Output: Negative

Example Input: I Have had trouble with HP and XP since upgrading. Although they say it is xp compatable with driver, it is not. Will cause system to lock up and when I called HP they blamed XP. Bought a Epson and first time install without a hitch. Hope this helps and God bless you!
Example Output: Negative

Example Input: This is a text book I ordered for my classes for teacher certification. This book is very easy to read, and I am really enjoying it. It presents info and then at the end of a section, recaptures the essence of the reading for you. I would suggest it for any teaching class. I am learning so much from this book. I have been buying all my text books from Amazon because they are so much cheaper, and sometimes I can get free shipping. So far, there has not been a book that I could not find here at Amazon.
Example Output:
Positive