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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
this is by far one of the worst step 2 prep materials ever! the questions on this CD ROM were random, poorly written, and testing very obscure material, certainly material inappropriate for the step 2 level. as an example, drug X effects which part of the electron transport chain? oh my, that's going way back into first year med, which in not what step 2 is about. we all know step 2 is for clinical applications of what we've learned as third year meds, and i can honestly say that this CD does not test these types of things. it was extremely frustrating trying to go thru the CD and "give it a chance" but i just couldn't take it anymore! try the NMS series or the A&L ERT if you want some computer practice, this exam master stuff doesn't cut it.
Answer:
Negative