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
Example solution: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Problem: First time I tried the extractor, it busted off inside the bolt. Very hard metal, but so hard that it is quite brittle. Very little amount of free play, and doesn't let you put any torque on the bolt at all, so if it is rusted in there, forget about this set! Seems like a cheap knock off of the ever so popular "easy out" set.Now I have to figure a way out how to get the stupid thing out of my bolt so I can drill a new hole and tap some new threads in. Can't drill it out because the metal is so hard, it is chewing up my drill bits.
Solution: Negative