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

[Q]: I am using this textbook in a class and it is a whopper. Wonderful pictures, easy to read, clear colors and understandable. I've been working in prisons for 5 years and this book makes a lot of sense. You ought to read their sections on women in prison and on probation. I loved the parts on geriatric prisoners (old cons) and the death penalty. And it is easy to read. More!
[A]: Positive

[Q]: 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
[A]: Negative

[Q]: I have a VERY picky 4 month old who refuses to eat using any kind of nipple other than these. These are what they started him on in the hospital and although they are supposed to be disposable, we have been able to use nothing else since (despite numerous purchases of other brands to try with him.)
[A]:
Positive