Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Cancer Cure That Worked

Who knows whether the original machine worked. It does not exist. All other 'Rife' machines are rife-less. Pure quackery. Put your money, heart and hope elsewhere. If it worked, we would all know about it. It might cost more, but we would willingly pay for it. Do we really think that there is a hidden cure for cancer. Ridiculous. There are so many looking for it. We would, collectively find, expose, publicize and pay for it. No problem. This is a money-maker for some sadly misdirected people, who are happy to make a profit off of those who are in desperate need of help.