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: This is the best scifi novel I have read for a while, goes above and beyond the author's revelation space series. It has real characters, good description of spaceflight in the next few decades, a mystery which really shocked me when revealed (didn't see that coming), plus big ideas and revalations about intelligent life in the universe. Everything fits together perfectly, highly recommended.
A:
Positive