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

Example Input: My Nomad Jukebox Zen Xtra 40GB only worked for 6 months. I no longer have any sound and the battery doesn't charge. When I called customer service I was given the excuse that it wasn't supposed to be used in the gym. As you all know it is marketed to fulfill your portable music needs. If you can't use it in the gym then it is not truly portable. I know many people who use their ipods in the gym and have had no problems for years. This product has fallen far below my expectations. It is not worth the $300, not to mention the fact that it only has a 90 day warranty. Can you trust a product that is only guaranteed to work for 3 months? No.
Example Output: Negative

Example Input: If you are not in really good shape this is a great product to get ready for P90X. It does get kind of boring because you are doing the same workouts every other day, but they do work. It is only about 30 mins but it is amazing how well it works.
Example Output: Positive

Example Input: St. Louis rapper Nelly hits the airwaves with the first single from his new album "Nellyville." The song is very catchy and was one of the summer of 2002's biggest hits. Not many rap artists can produce catchy songs due to the high level of un-originality that market has (e.g., sampling Broadway musicals, Duran Duran songs, etc..) but Nelly has proven that with this song that not only can he get his groove on, but that he can produce a single with high potential for market crossover success. Regardless of his feud with other old-school rap artists such as KRS-1, Nelly's appeal lies in his ability to adapt to the times, something that many rappers have not been able to do. Only a handful artists such as Busta Rhymes, Queen Latifah, and Ice Cube have mastered the art of keeping with rap's evolution, and so far Nelly has. Overall, "Hot in Here" is a great summer anthem sure to keep anyone moving. Regardless of the song's critics it remains one of 2002's best jams.
Example Output:
Positive