Given the task definition, example input & output, solve the new input case.
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.
Example: I have bought several of the Vitality canned dog food products and have found them all to be of good quality. The product looks more like a stew than a processed meat and it smells better. My Labrador is finicky and she appreciates this product better than most.
Output: Positive
It's a positive review because the owner of the dog is satisfied with the product and mentioned that their dog appreciates the product.

New input case for you: 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