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

This was the biggest waste of money ever created. If you want to know the song that much, call the station and ask them, they don't mind, really.
Negative

why am I being asked to review a product I didn't purchase. Need to fix the system or allow me to delete the request.
Negative

Interesting and a very informative story about how the Cave people survived. The writing was somewhat elementary and repetitive but with a good plot. I would not read the second book in the series.

Positive