Given the task definition, example input & output, solve the new input case.
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Example: I've read this book with much expectation, it was very boring all through out the book
Output: Negative
Review writer does not like the book because it was boring, therefore it is a negative review.

New input case for you: I had another infrared massager before this one that I used for years to help with sore muscles and a nasty TMJ condition. It finally shorted out and I bought this product just a few weeks ago. I had one of the worst headaches of my entire life yesterday and was using this on my jaw when I most unfortunately fell asleep. I guess muscle relaxers and vicodin will do that to you. Anyway, when I woke up, I found that I had rolled over and the infrared massager was underneath my pillow. It completely melted and burned through my sheets and a couple inches into my mattress. I had fallen asleep a few times with my other infrared massager with no consequences so this surprised and dismayed me. This is not a safe product - it either needs to be made of sturdier material than cheap plastic or have a timer on it - I would certainly be willing to pay the extra money to not have to worry about setting fire to my house or burning myself. Sorry - can't recommend it.
Output:
Negative