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

Example Input: All the elements of a great movie. What can I say, I love to study the elements of war, and I enjoy a good love story along the way. This movie was a great introduction to the role airplanes had in the first World War. Featuring the story of the Lafayette Escadrille, and the role Americans had in the early aerial engagements. The story also allows those who have little knowledge about early technology to understand that it was very rudimentary. (Using hammers to clear your machine gun comes to mind.) The soundtrack was very well done, and the needed animation(?) was excellent as well. I highly recommend this movie.
Example Output: 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: This is all about the message. The madman, The lighthouse keeper. I know it all sounds strange and all that, but listen to the words. It may just give you hope!
Example Output:
Positive