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

Example Input: The book covers several generations, so with each generation you have to re-learn all the characters. It is difficult to keep track of who's who when every time you get to know the cast, 200 years suddenly pass and we're in the middle of a new crisis. I didn't read the whole series because of this -- it was obnoxious.
Example Output: Negative

Example Input: [...]I would not recommend this book. Russell does make some remarkable findings, however, his theology is corrupt and he is a party to a cult.
Example Output: Negative

Example Input: The Sony eMarker is an awesome idea, but understand that it is nothing more than a stopwatch that depends on data from a website powered by Sony and Broadcast Data. This information seems to need some help, as the "24 Hour" wait for playlist updates is sometimes taking 5 days. The product is cool, but Sony needs to keep their end of the deal and update the website... I'd wait for a few months before buying another one so that Sony can iron out the bugs.
Example Output:
Negative