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

Ex Input:
I have only wore these boots a couple of times, so I may be reviewing them too soon. As other reviewers have stated they don't seem to need a break in period, but there is a certain "learning" period. I say this as a person who literally has worn nothing but tennis shoes for years. The learning is getting used to the extra weight and bulk on your feet. I bought these to be a part of my "bug out" plan. I will soon be going on a real hike on rougher terrain to see how they feel then. Plus until I have put many more mile on them to see how they hold up I can't say for sure how many stars they deserve. I give them 4 for now and assuming 200-300 miles from now they are still in good shape I would change it to 5.

Ex Output:
Positive


Ex Input:
I was surprised to see that the item was used. Advertised as new. Would have liked the new ones stead got used.

Ex Output:
Negative


Ex Input:
This book really wasn't for me. It's the same tripe as 101 other books of the genre. Although, it might be useful to the right person. I'd happily recommend it as a gift for a teenager, or anyone who doesn't usually read books. The book reads a lot like the "Chicken Soup for the Soul" series, with quirky quotes and anecdotes, but very little substance. On the bright side, after reading Chomsky or Neitzche, McWilliams is a comic relief.

Ex Output:

Negative