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.

Mr. Pratchett is a very good writer, and while not every discworld novel is a knock out, none have been bad. Of all of his work this is my favorite. I reread it at least every couple of months. Bruthra and Om [pointy horns] spin a tale quite entertaining that keeps me coming back. I only wish Mr. Pratchett had spent more time talking about the librarian/watcher monks. I hope you enjoy this book as much as I do.
Output:
Positive