You will be given a definition of a task first, then some input of the task.
In this 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.

I purchased 2 sets. I've used this cup only for a day, then I found there is water between two walls. There is no crack at all. How could it happened? Now I only can use 3 cups.
Output:
negative