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: This was my first experience of a bad Darjeeling - before, I hadn't known there was such a thing. The first brew yielded a dark rust color tinged with olive-green. The bottom of the cup was invisible. The taste was sharp and astringent. Thinking I'd brewed too long or too strong, I set the first cup aside and tried again. And then again. A light brew of 3 minutes improved the clarity; however, nothing I have tried since has removed a level of astringency and a furred taste that I associate with lesser teas. The wet leaves are the typical size, light brown but unexpectedly interspersed with limp green squares.  The aroma of dry tea in the bag reminds me of old hay - neither moldy nor spoiled, just old. In contrast, the Davidson's Keemun Conjou which arrived in the same shipment smells and tastes like delicious Keemun Conjou and nothing else.  Given the price, I knew I was gamboling and consider this a lost bet. I have given the product two stars instead of one, because I haven't thrown it out (yet). I keep a supply of Lipton's bulk tea for emergencies such as long periods of unemployment, and I don't really need more emergency tea. Perhaps it will work for iced tea.  By no means am I an expert, but I do value tea, and so I hope this opinion helps other buyers who are trying to decide between two Darjeelings. Davidson's ships quickly with value pricing, and so I am not giving up on the merchant. Just on this particular Darjeeling.
Example Output: Negative

Example Input: I have purchased several herbs from Frontier which have been of good quality.  Thyme leaf is always one of the most difficult to purchase due to the likely chance of recieving more stem than leaf.  This thyme leaf purchase was of average to good quality.  I did have about 30-70%, stem to leaf cut in the package, so I was satified with the selection.  When I dry my own thyme leaf, I usually do about the same or a little less stem to leaf ratio for cooking use.  Stem of the thyme leaf are just as favorable as the leaf and can be used to cook with successfully.
Example Output: Positive

Example Input: I had good results with this product six months ago.  However, a second purchase that I just opened caused all of my three dogs to vomit within minutes of eating the product.  I removed other items from their diet to be sure and it did it again, instantly. I contacted the company about it and they have claimed no other problems exist(suggesting I must have tainted the product or have exposed it to an environment making the dog snacks unstable, or the company I purchased them from somehow did something to the product. Hmm: sounds troubling to me, especially from the factory.). I have seen other issues out there regarding this product, which vary.  Use your own methods of making a control group, but be sure to see they have proper bowel movements and are not vomiting after you feed them the product.  Secondly, Greenies.com(the Nutro Company) will not honor purchases made through unauthorized vendors.  Amazon directly is an "authorized vendor".  "Monster Pets" is not authorized to resell these items and only those vendors listed on their website are "authorized".  They will only help you return/refund something if it was purchased through an "authorized" vendor.  This now makes me leery of items purchased through "Amazon Marketplace", particularly food items.  Buyer beware!  Caveat emptor!
Example Output:
Negative