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.

Example Input: I decided to purchase this product based on a blog by one of the supplement oriented doctors on the internet, hyping erythritol as superior to xylitol, which I use regularly and find the closest to sugar in taste with almost no aftertaste and no side effects to my knowledge.  The problem I find with erythritol is its lack of flavor.  On cereal, I barely notice any real sweetness, even when I put as much as a tablespoon and a half on a normal size bowl.  When I use Ideal, the name of the xylitol brand I use, it has the same sweetness as sugar in the same proportion.  Don't get me wrong, erythritol isn't unpleasant, it just has very little sweetness relative to how much you use.  Not worth the price unless you want just a hint of sweetness compared to what you get with sugar or xylitol.
Example Output: Negative

Example Input: I can not believe that this is actually for sale. It needs to be recalled. Sugar is absolutely unhealthy for all your pets. They do not digest/assimilate sugar like we do. Every Vet will tell you  the same thing and you will never see any quality treats or food that has sugar or corn syrup on the ingredient list. If you do see it on the list, DO NOT BUY IT!!
Example Output: Negative

Example Input: Spectrum Naturals Walnut Oil, refined, is a very mild oil. I can't detect any walnut smell or taste any walnut flavor at all. Maybe that's what you want in some cases, though I was hoping for a more nutty flavor like raw walnuts.  It does have the advantage of having higher Omega 3 content than most oils. Also most oils that are high in Omega 3 (like fish oil and flax oil) have a strong taste which you probably don't want on your salad.  Unlike some of Spectrum's oils, it is not organic.
Example Output:
Positive