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

Example Input: This is not a new book;perhaps that's why it is so useful.There is no gobblygook, no arcane economic theories with fancy lables.What there are in this book are many examples of - - if the government takes this action to make this or that happen, the unintended consequences have proven to be and will probably be again something quite different, and usually not positive.Sound experiential economics in my view, clearly written; and a tremendous help to understanding what will probably happen if the nation takes on more debt, subsidizes this or that interest, taxes one interest at the expense of another, etc.I liked it; I could read and understand it.
Example Output: Positive

Example Input: This is a great book so far. I am a little farther than halfway into it and it is great. Although the writing is a little choppy at times, it is definitely worth it.
Example Output: Positive

Example Input: ...but a very good pick anyway! As usual Don Caballero manage to hover miles above the average indie-record. This time tough the music is less aggressive, the drumming less furious and the pace is overall calmer. Don't get me wrong, they haven't limped, they still spark with energy and creativity, only the've become more "mature". For those who don't know anything about the band I'll just say that they find themselves between shellac and tortoise, between arty improvisation (which most people call post-rock) and noise-rock.
Example Output:
Positive