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

Ex Input:
just for the record: last day off my vacation in mexico and i dived into the Carraibean with my digital camera into my pocket :) (don't ask why) and althogh the camera is now mearly scrap (pentax optio s) the memory card works fine and i didn't lost any of my vacation photos with would have been a lot worse - so SD cards are water proof and salt water proof :)

Ex Output:
Positive

Ex Input:
There is no plot. What in the world did I just watch? Nothing made sense, from beginning to end. I've lost my faith in humanity after watching this...

Ex Output:
Negative

Ex Input:
The most unusual story of a young man facing life with a handicap. I felt like a cheerleader and prayed that he could overcome. I could hardly wait to reach the end of the book. Don't peek!

Ex Output:
Positive