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

Example Input: Lots of great ideas for those with unlimited budgets. Many of the suggestions are not within the economic means for those thinking about setting up a shop; although the author includes many photo's for the "Dream" shop. Most references to tools include equipment that costs $1,000's (or more!). Lot's of fluff from the author and plentiful color photos of shop layouts, tools, and equipment that the average "Joe" would spend decades purchasing. Not too much "practical" information about "The Practical Guide to Designing and Building Your Dream Shop". Definately a dream.
Example Output: Negative

Example Input: As well as a trilogy that is as far-reaching as it is set in a far-distant time with characters and galactic backdrop unrivaled by any other book. Definitely one of the great science-fiction classics just like "Stranger in a Strange Land", "Childhood's End", along with modern-day cyberpunk like "Neuromancer", "Count Zero", "Prey", "Cryptonomicon", "Snow Crash", "Darkeye: Cyber-Hunter", etc.
Example Output: Positive

Example Input: As a student and teacher of economics, this book has proved to be an invaluable resource! The lesson is simple and direct, yet one that many people fail to apply. This should be required reqding for anyone involved in the development of economic policy (or any other arm of policy making, for that matter). Whether you agree with Hazlitt's conclusions about how the market works or not, you cannot dispute the key lesson of this book. It is entertaining to read, particularly easy for a book about economics. I highly recommend it!
Example Output:
Positive