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

Ex Input:
I've bought several air beds from various manufacturers. I bought one identical to this one 1 1/2 years ago. It was comfortable but lost air after 3 months. I justified this as the user may have not taken care. However, I now believe its the brand. This one would not inflate at all. I will not buy this brand again. I've had great life from a better brands.

Ex Output:
Negative

Ex Input:
This toy has peaces that fall off even while puting it together it kept falling apart the legs would not stay on and part of the tower would not stay together. I would not recomend this toy to anyone else or pay for it again myself.

Ex Output:
Negative

Ex Input:
Great book, had seen the movie but the book is much more. It will hold your attention and is an easy read too.Even better, the e-book was free on Amazon!

Ex Output:
Positive