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.

This product does what is said in the description, my waist got smaller and I can stand for hours withoutfeeling any pain on my back. My work requires a lot of lifting this product help protect my back. I love it! Is my second buy. The price is also good, the first one I got cost me $55 this time I paid $36 for it.
Output:
Positive