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.

Anyone who thinks that becoming addicted to Valium can't happen to them should read this book. Brutally honest it follows Barbara Gordon, a successful award winning documentary film maker, through her addiction to Valium and her painful struggle to get off. This is a great read. I won this from Goodreads.
Output:
Positive