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: Being a contractor for 25 years I know how to calibrate a stud sensor... this is the biggest piece of junk I've ever bought!!! I wished I could get my money back!!!

Answer: negative

Question: Terrible customer service, at first my safe was supposed to arrive on the 5th, then It was the 8th, then the 14th, and now I'm being told I have to contact the shipping company to find where my order is??? DO NOT BUY FROM THESE PEOPLE. I also found out the they just bought it from Wal-Mart and had the shipping company pick it up. I could have just drove to Wal-Mart and bought it myself to save all this headache!

Answer: negative

Question: The first battery did not work more than a month. They sent me another one and that one was even worse. After purchasing a new Shark Navigator, I put the Shark battery in my old vacuum and it worked. Then I put this off brand battery in my new Navigator and it did not work. Clearly these generic batteries don't work.

Answer:
negative