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 have a smallish black dog that disappears into shadows and night an this collar is perfect to help keep an eye on him. He is so small I was able to get two equal lengths out of the collar portion and I love that it is rechargeable.
[EX A]: positive

[EX Q]: I bought this for my daughter and we were so excited about it. It worked for maybe 20 minutes tops... I thought that maybe my batteries were bad.. nope. We tried several different batteries and it still doesn't work. It's a cute puzzle, I just wish it still sang the song!
[EX A]: negative

[EX Q]: Freakin awesome and easy to install. One of those inventions that makes everyone else seem silly. Took about two minutes to read the directions AND install it. I wish they came in a large pack of pieces. Easy to add additional pieces, but the default sizes are too small. Need a multipack of more pieces to make this perfect.
[EX A]:
positive