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: Worst Nicholas Cage movie ever made. See the Harvey Keitel version for a great watch.
Example Output: Negative

Example Input: This book dates back to the civil war era. It was the fashion source that women turned to for the most current information on what to wear. If you have ever wondered what they really wore, and why they wore it then I would suggest that you look to these books for the answers. Typically these books have a full year bound together. Each month should have a color fashion plate featuring the current wardrobe fashions. They also have music, poems, short stories, knitting and crochet patterns, health tips and cooking hints. They provide a valuable insight into the era. If you are a civil war reenactor there is no better source for accurate information, and if you are just a fan of American history, these books are an outstanding source.
Example Output:
Positive