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 pillow is incredibly helpful for people who have difficulty getting comfortable in bed because it affords a variety of positions to relieve painful areas. But getting in bed can require some simple gymnastic maneuvers because the pillow is so thick and cumbersome. And getting out of bed also requires some special moves, especially if you have a high mattress. Overall, not a simple process for a good nights sleep. The head area also compresses after a few nights of use and rearranging the filling is bothersome. Because it's a considerable investment, I end up using it only occasionally.
A:
Negative