Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example: I've read this book with much expectation, it was very boring all through out the book
Solution is here: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this: Very comprehensive, can get you up and running in 48 hours. A very thin book that contains the bare essentials as to familiarize yourself with MIDI and the initial steps to set up a working compilation of MIDI products. Explains concepts such as sequencers, samplers, MIDI-IN/OUT/THRU and countless more... the good part is that even though it holds great amounts of information, the book is orgenized in a way that is easily referenced in the future. It's easy... it's wonderful.
Solution:
Positive