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]: This mat is so small, and as others have noted, the "turf" is pointy - so it probably hurts cats' paws (it hurts my knees!)  My cat jumps right over it and I end up with litter kicked up all over the place.  Seems like a good concept, but I would bet it doesn't solve most people's problem of trying to contain the litter.  I just bought an extra large Petmate Litter Catcher that has 4-1/2 stars.  Hopefully, I'll have more success with that!
[EX A]: Negative

[EX Q]: I don't know why this flour isn't available in grocery stores in the Midwest.  Typical grocer flours have a protein content much too high to give an authentic taste to such foods as pizza crust and homemade pastas.  And after years of making homemade pastas and trying to find that perfect recipe that would result in those served in the best Italian restaurants in the US and Europe, I'm happy to discover, the secret was in the 00 protein content all along.  What a fabulous difference this flour makes!  Freezes well too.
[EX A]: Positive

[EX Q]: this stevia is the best tasting we've ever tried. it also mixes into beverages more thoroughly than some others.the service from this buyer was prompt, the product arrived on time and in excellent condition. would order from them again, and recommend them to others.Linda blyth
[EX A]:
Positive