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.

Fantastic book! I was kept on the edge of my seat from beginning to end! This book is definitely going to be the start of an excellent series. The novel is based back in Venice, just around the decline of the Byzantium era. My favorite characters were without a doubt Manfred and Erik.This book is an excellent buy!
Output:
Positive