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.

[EX Q]: First of all, they took a long time to get to me. They come with no instructions. No way of knowing when they are fully charged. Charge doesn't last long, at all. And they scratch very easily. Very disappointed with this product unfortunately.
[EX A]: negative

[EX Q]: My brother had these and they really do keep the lemons and purchased the lime as well longer and juicy. Plus easy to display for drinks. Great product.
[EX A]: positive

[EX Q]: I had hopes for this dog puzzle. To be fair, my dog is medium size, weighs 24 lbs., and has lost a few of his small front bottom teeth. This item is too hard for him to retrieve treats. I could see him really work with it but he got really frustrated. Probably better for larger dogs with more powerful jaws. For my dog, it was not.
[EX A]:
negative