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

Example Input: I was installing these chips in a G4 Sawtooth macintosh computer and the chips did not work. I had kernel panics that eventually left the operating system unusable. The hard drive had to be reformatted and the OS re-installed. A great headache and PITA. I need to return these memory modules, how would I do that.best regards,vilppu
Example Output: Negative

Example Input: I buy/view/listen to a lot of music video's (read, sorry night life) and this one was a disappointment. Sound varies too widely act to act. Couple of goosebump moments (I love the Mega-Guitars on Kansas City) but mostly a smorgas-bored of available talent putting in their charity work. Zero additives for the video freak and no real explanation of charitable intentions ever given. Borrow this from someone instead.
Example Output: Negative

Example Input: I ordered this book 2 weeks ago and it just now came today. What's worse, it's in absolutely terrible shape. The front cover is ripped, the spine has old sticker residue on it, and the back looks like it's been chewed on by a small animal. So much for being "Used- Very Good Condition"
Example Output:
Negative