Definition: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Input: Why does everyone rave about this? One of the reviews even says, "If you need this then get it." Yeah, if you're travelling you need this, but more importantly why can't Apple just sell the different adapaters individually? Apple must assume that a lot of people have more than one of their products - perhaps a macbook and an ipod, so wouldn't it make more sense to sell the adapters individually, that way one could buy for example two European adapaters, one for ipod and one for macbook? Another apple rip-off if you ask me.
Output:
Negative