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: Don't have enough time or money for Childbirth classes? Are the classes full? Watch this video instead! Really thorough and informative. It has the same information as classes for about a tenth of the price.
A:
Positive