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

Ex Input:
At first I was disappointed that this wasn't a longer book, but then I realized that it is great to give away to curious friends and parents as an introduction to Love and Logic. I just wish it was a little cheaper.

Ex Output:
Positive

Ex Input:
why am I being asked to review a product I didn't purchase. Need to fix the system or allow me to delete the request.

Ex Output:
Negative

Ex Input:
I used this product for one month of every night sleeping before it sprouted a leak in one of the seams on top that couldn't be patched due to the fabric. It makes patches virtually impossible to stay stuck.There you have it.

Ex Output:
Negative