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

Example Input: This book came out a long time ago. I read it when it first came out and it introduced me into the world of ghosts and and lore. I was 12 years old then in 1982 and even now when I pick it up to read....it still takes me back to the feeling...when I first picked it up and sent shivers down my spine...in a fun way of course. The stories and the drawings were perfect together. A great book. I have all 3 volumes now and I hope he comes out with a 4th one soon.Thanks Alvin and Stephen for scaring the pants off of me when I was 12.
Example Output: Positive

Example Input: This machine does a decent job of cleaning when it works, but it breaks way to easily for the price, and its not built well enough to justify fixing. Too many cheap plastic parts. Consider it to be disposable if you buy it.
Example Output: Negative

Example Input: Is this an exercise video? It moves too slowly with too many breaks to give a decent workout to the intermediate bellydancer.Is this a dance instruction video? It assumes you already know a good bit about bellydance, and leaves the beginner to improvise too much.The only part I found helpful, as the previous regular user of several other bellydance videos, was the veil and finger cymbal portion. I'm thinking of buying some finger cymbals now!
Example Output:
Negative