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

Now, solve this: The charger works fine as advertised. The location of the of the charger inlet on the phone itself is not very good - makes it awkward if you are charging and trying to talk.
Solution:
Positive