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.

Bought this product almost exactly one year ago. Worked great. Changed the batteries about 4 months ago. Changed the batteries three times yesterday and the door is still saying the batteries need changing. This morning I checked to see if my cats were locked out in the cold all night. Thank god it still works, for now.
negative