You will be given a definition of a task first, then some input of the task.
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

I regard Dr. Bernstein as the top authority for Diabetes. This book will give a diabetic all the information required to completely understand his/her condition. I do not have the discipline to follow his recommended diet...however, with the understanding of Carbs, I can with diligence control blood sugars. I give more credence to the Glycemic Index than Dr. Bernstein...seems to work for me. I do not hesitate to recommend this book to all diabetics and partners of diabetics!
Output:
Positive