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]: The Roomba 980 performs as stated. Excellent pick up and battery life. The WiFi connectivity is handy for as needed cleaning between scheduled times. We are very pleased with the unit.
[EX A]: positive

[EX Q]: 4.5 stars The vented bottles helped so much with my baby's gas problems. Took half star off cuz they are diff prices depending on color, wished they were same prices
[EX A]: positive

[EX Q]: Extremely disappointed as this gift that I purchased for my daughter for Christmas, was dirty and had food (or what looked like food) stuck in the blender attachment. What's even worse is my daughter just opened the blender this weekend to use for a recipe, so it's already passed the return window. Won't be buying from this company again in the future!
[EX A]:
negative