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]: Slips off of my glasses after few hours time. They should grip and stay but they just fall right off and I have to keep putting it back on my glasses.
[EX A]: negative

[EX Q]: Do not replace your Bose headphones. Get these replacement pieces, throw the stock ones away. These will make your headphones sound the way you hoped they’d sound when you got them. I went for a 20 mile bike ride with them stock and when I got home I checked the mail. My replacement (nibs?) were delivered. I put the new ones on and threw out the old ones. The sound is incredible. Get them. Even if you aren’t sick of the stock nibs. Get these. You won’t be sorry.
[EX A]: positive

[EX Q]: Use in the home and in the car while traveling. Easy to charge using any USB outlet. Quiet enough on low speed to not hinder your getting to sleep. UPDATE Mar 2019: For the past two months I have been using this fan next to a home gas space heater, to assist in distributing the warm air better. It's been ON all this time and on various speeds without a hitch! It's quiet, and easy to place with its huge clamp! I've removed the battery and it is working off a usb cord plugged into a usb charger! WoW!!
[EX A]:
positive