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

Example Input: Over the winter, i seem to gain alot of weight. As a high school quarterback, that is not acceptable. Last summer, i think i went from 160 to 150. That's my gross weight loss. I'm not even talking about how much fat i lost. I gained a good amount of muscle over the summer, so i probably lost over 15 lbs of fat. I got my six pack back, and life was great. After the season, i just quit, and now my six pack is back in the fridge. I'll probably order some up next week and start again. These are great, and the results are amazing.
Example Output: Positive

Example Input: The adapter worked fine for my power book g4 for a few months and then it broke. Nothing physically happened to the adapter for it to break, but suddenly it just wouldn't charge any more. What's interesting is that the blue light on the brick goes on when plugged in to a power source, but if I plug the cable that attaches the computer to the brick in, the light goes out and it doesn't charge.
Example Output: Negative

Example Input: I did not enjoy this video or find it informative. I thought the video was very boring and only watched half of it before I tossed it. Also, I bought this because I was having my first child and didn't know what to expect during labor but once you go into labor the nurses tell you everything to do so the video was a total waste. Also, the lady on the video is very annoying. I felt embarrassed for her.
Example Output:
Negative