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]: I'm so glad I stumbled across this product, because it has seriously improved my WiFi speed. Using it on an older laptop , I noticed that WiFi speed was faster than the built-in WiFi . I later tried it on an older desktop and it was very fast as well. An excellent product!
[EX A]: positive

[EX Q]: Bought this after reading good reviews. But it's not water proof at all. If my son has even a little accident in bed, it goes straight to mattress. I don't see a point in having this. So I have to purchase another one.
[EX A]: negative

[EX Q]: Product arrived without the screws to put it together. We have called the hotline several times. You have to leave a message. No one has called back. Waiting to know what to do about it.
[EX A]:
negative