Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Example Input: I've read all of the Night World books, and this is a great book, but I must say, it's not L. J. Smith's best
Example Output: Positive

Example Input: This corkscrew is poorly made, consisting of low-grade stampings and flimsy plastic molded parts assembled with tinned rivets. It feels like it's going to come apart in your hand, and it requires considerable care to use it safely and effectively. It's outrageously overpriced, too. An unfortunate product offering from the company that brought us the legendary original Screwpull, perhaps the handiest corkscrew ever.I did manage to pull a cork with it, though - which is why it gets even two stars.
Example Output: Negative

Example Input: Definition of a bad book: a book that doesn't make you want to get to the next chapter. I kept trying to see if this would eventually grab me, but after maybe 10 chapters or so of plodding prose, I gave up. Thank goodness it was a library book.
Example Output:
Negative