Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example is below.
Q: I've read this book with much expectation, it was very boring all through out the book
A: Negative
Rationale: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: It's about time that stoner rock acknowledged it's british blues/blues-rock/psychedelic/acid rock/hard rock roots. Good riffs, nice bluesey vocals, that's all I gotta say.
A:
Positive