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

Ex Input:
this product is good for child I guess..cause it is a little thin...but it is better than the one I saw on sports authority which is thiner

Ex Output:
Negative

Ex Input:
I'm sure the information presented in this class is good, but the presentation set my teeth on edge. Sheri thinks she is funny when she talks in a screeching voice and makes fun of new mother's foibles in her "funny stories". I cringed every time I heard her squeal as a pretended mother with a problem. If you can get past her, then I guess the DVD can give you the information and techniques you need for Lamaze. But unfortuanately Sheri spends more time talking or shrieking while trying to be amusing than just giving the information you would like to hear.

Ex Output:
Negative

Ex Input:
I washed it before used it for the first time. The next day I wore it, I found my skin were itchy all over place on my stomach. And I feel that the heat on my body trapped on that.

Ex Output:
Negative