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

Example Input: I bought this set for my husband and brother for Christmas last year then we ended up buying a different set for the movie cash for the new movie. I went to sell this set at used movie retailer and they informed me it was from overseas and possibly a bootleg. WATCH OUT!!!!!!!!
Example Output: Negative

Example Input: Wow..thats basically all i can say. I bought the cd, then realized that they were playin live like 20 minutes from my house. They put on an amazing show! They closed it with do you call my name, then went backstage. The crowd started chanting, "ONE MORE SONG!!" The drummer came out and started playing again. Then all the rest came back out and played one last song. Ra is underrated and a great bunch of guys. I got my cd autographed by all 4 and i got a picture with them. Buy From One, Duality, and SEE THEM LIVE!! My ears are still ringing.
Example Output: Positive

Example Input: great for when you need an extra battery. It is a great deal on amazon because the cost would be more at a retail store.
Example Output:
Positive