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.
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Question: I can't let go of the design and the color of the metal. It looks very high-end! Hold it in the hand is even better! I can easily open a bottle of red wine right now, and I don't have to worry about pulling the plug.

Answer: positive

Question: Buying these is like playing Russian roulette. If you get a good one, like a friend of mine's, they are well worth the price. But the one I received had parts that did not lock together and the rotor wobbled. I returned it.

Answer: negative

Question: Bought this salt for our 20 gallon fiddler crab tank and it works perfectly. It is maybe not the most cost effective salt additive; you can buy marine salt for cheaper. Folks seem confused about aquarium salt. API aquarium salt is NOT for brackish/saltwater tanks. It does not supply the necessary nutrients, minerals, etc. THIS brackish salt can be used for brackish or saltwater setups, although, as stated previously, not likely the most inexpensive option if you have a larger tank.

Answer:
positive