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

Input: Consider Input: A wonderful pictorial book about transistor radios, 175 of them, not only photographed but put in the context of fifties and sixties design. The spread on 60-61 shows six radios mixed with close-up photos of chrome styling from fifties cars. I loved the chapter on design with its photos of grills and lettering, even a spread on 9-volt batteries.This is the kind of book that Chronicle do so well, interesting subjct, well designed and printed all for the general reader. If you collect these radios you will certainly want to have a copy but don't expect to get lots of technical detail or a price guide. For that have a look at 'Collector's Guide to Transistor Radios' by Marty and Sue Bunis, plenty of text about seven hundred models, some photos and that all-important identification and price information.

Output: Positive

Input: Consider Input: I am using this textbook in a class and it is a whopper. Wonderful pictures, easy to read, clear colors and understandable. I've been working in prisons for 5 years and this book makes a lot of sense. You ought to read their sections on women in prison and on probation. I loved the parts on geriatric prisoners (old cons) and the death penalty. And it is easy to read. More!

Output: Positive

Input: Consider Input: Besides his Robot stories and novels, Foundation stands as oneof the greatest science fiction novel written by the late IsaacAsimov.By mixing properly the future, humanity and the sociopoliticaldevelopment of our race on a galactic span using the decline ofthe Roman Empire as a base, Asimov tells us a story of one man'sstruggle and the product of its stubborness in following stories.This book is a must for anyone, genre fan or not, I guaranteeyou will read it more than once in your lifetime.
Output: Positive