Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Example: I've read this book with much expectation, it was very boring all through out the book
Example solution: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Problem: I just got the adapter today, I plugged it into my iBook G4, and I was able to turn it on, but the battery doesn't charge, and after a minute or two, the screen dims and the laptop goes to sleep. Buyers beware! You might consider an official Apple adapter!
Solution: Negative