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: The case I had didn't fit properly - the window obstructed the rightmost side of the display. You could shift it over, but it would always shift back. I don't know if they are all that way (maybe I got a bad one?), but I didn't want to buy another one to find out.
Example Output: Negative

Example Input: I am a great fan of Maeve Binchy's writing. I love her detailed character observation and how it lets the reader recognise bits of people in her characters. Silver Wedding centres around a 25th wedding anniversary and the plethora of dilemmas such a seemingly straightforward celebration can cause. Anyone who has ever organised a family event such as this will love the descriptions of family politics, and I'm sure many will sympathise with the heroine's family traumas and how being 'the responsible one' can lead to all sorts of complications, not to mention that vaguely disquieting feeling of being put upon. A good read.
Example Output:
Positive