Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Example input: I've read this book with much expectation, it was very boring all through out the book
Example output: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: I learned a lot about the Eastern Front Luftwaffe. It is as much a study in the personalities as it is a history, strategy book.
A:
Positive