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

Example Input: I was very excited to buy this scanner and was pleased with its size and weight. However, if you have a Vista operating system, like I do, IT WILL NOT WORK! The company told me that they stopped selling this product over a year ago and there are no driver updates available for this product. If you have an older computer and an older operating system this product might work for you. But as for me it was a waste of money!
Example Output: Negative

Example Input: I was very happy with my product I absolutely love it!!! And it was brand new at a very reasonable price. Gonna continue my shopping on amazon.
Example Output: Positive

Example Input: The dvd is a documentory, alot of talking and very little music. I thought it was them in concert. Too much talking
Example Output:
Negative