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: Do not buy this toy - it has been a source of frustration and disappointment for all 3 of my children. Difficult to put together (and I have assembled my share of kid's toys), it will not stay together at all. It is challenging (at best) to get the figures in the elevator, and none of the figures with capes will fit - they tend to get stuck halfway up. The elevator also requires the child to turn a little wheel to get it to go up - too difficult for little ones. It requires a degree in engineering to get the little plane to fold up inside the watchtower - very poor and frustrating design. The noises are also weak as are the features (i.e. the trip wire, rockets, the plane). Just a complete waste of money - it is only a couple of weeks old, and it is headed to the trash.
A:
Negative