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

Ex Input:
When I purchased this product, I thought I was getting a good deal because of the cheaper price. However, once I received it, I knew I had made a mistake. I've been using this product for several years now, and I knew just by looking at this one that it wasn't right. The texture was incredibly thin, and the color was much lighter -- something that could only leave me to believe that maybe water had been added to it.Lesson learned -- spend the extra money -- you're paying for quality!

Ex Output:
Negative

Ex Input:
This book was brand new when I received it. However, it did not arrive for 20 days after I ordered it.

Ex Output:
Negative

Ex Input:
Brian Weiss ha dejado una magnifica guia para quienes no tienen mucha informacion acerca del Hipnotismo, La historia de Katerine es tan impresionante que podria ayudar a culquier persona que se ha hecho la pregunta mas de una vez sobre la continuidad de la vida.

Ex Output:
Positive