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:
I found Sandra Burr choppy and irritating to listen to. Her voice was not what I expected. There is another version of this book narrated by another woman whose voice is smooth, and can put you to bed. Yet she tells the tale with enough excitement and with different tones for each character that you are compelled to listen ALL DAY!The plot is wonderful, though if you want to listen instead of read, I don't reccomend the Sandra Burr narration. I reccomend the one read by Rowena Cooper. AMAZING!
Answer:
Negative