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 tea is stale.  I have had this brand and kind of tea many times, so I know how it should taste.  It's dated Jan. 2013, but it must have been stored improperly.  It has no fragrance and no taste.  Even the teabag paper looks yellowed.  It is worse than supermarket tea.  I cherish my breakfast tea, so am very disappointed, especially having bought six boxes of this useless stuff.  I tried to give it no stars, but that's not allowed, so I gave one for prompt shipping.
Example Output: Negative

Example Input: Buyer beware! The label on the Amazon site clearly states "D.O.P Certified" but the product received does NOT match the site label and does NOT state "D.O.P. Certified" This is bait and switch and I will file a complaint with Amazon.
Example Output: Negative

Example Input: A word of caution to anyone considering buying these: Read the ingredients first! I made the mistake of thinking they would be the same as the longer (Oberto brand) ones our local Costco used to sell, so I ordered up 10 bags to get the volume discount offered at the time. I knew something wasn't right as soon as I opened up the first bag and got a whiff. Then I read the ingredients and was shocked when I saw that they actually use pork hearts as the top ingredient. To eliminate any doubt, I tasted one.. we've been using them as expensive doggy treats ever since.
Example Output:
Negative