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

Ex Input:
This set of assorted short tracks is hard to avoid if you want to create a track layout of even an intermidiate size. The male-male and female-female pieces will provide a dramatic increase in the number of layouts possible as you can now overcome the problem of curves returning to the starting position.This is a must-have for any Brio enthusiast.

Ex Output:
Positive


Ex Input:
Despite the many reviews from folks who had to return one or more Sansa Views before getting a functional one, I figured the manufacturer must have cleared up their quality problems to stay in the market. Wrong!!!!My brand new Sansa View 8 totally stopped functioning about 20 minutes into its first use. I'm very disappointed to have waited for my order to be filled and now must wait again for a replacement. I'm more than a month into my purchase and I have nothing to show for it but a paid bill.Amazon has not stepped up at all, either. The order was filled by a vendor whom I've never heard of before. Amazon refers buyers to that vendor's customer service and takes no part in satisfying the purchaser.Lots of room for improvement on the part of all three providers.

Ex Output:
Negative


Ex Input:
This printer will do everything that you would want from a low cost high output machine. The HP 1000 is the best in the photo series and I would recomend this printer to all my friends.Try it, you will like it, like all HP products.

Ex Output:

Positive