You will be given a definition of a task first, then some input of the task.
You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

This stuff will give you a marked energy boost. Note that every person is different. For me, this lasted 3 hours before the crash. (Not a sugar crash.) But my heart was pounding like it wanted to burst through my chest. So I only drink half at a time (like another reviewer) and it works, without the scary heart acceleration. It's even tasty.
Output:
Positive