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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
As an avid sci-fi reader, I felt I had to rectify an oversight and read the book that really is a foundation of much of today's sci-fi. When I started the book, I planned to read the entire series. I was so completely let down that I don't know if I'll ever read Asimov again. Foundation simply failed to ignite any spark in my imagination. The characters are poorly developed, largely because of the huge leaps in time throughout the book. In addition, the inability of a person writing sci-fi -- which by its nature looks to the future -- to envision any role for women in that future is deplorable. I thought Asimov's work trite, boring, and completely lacking in the sort of foresight that makes books by authors like William Gibson and Tad Williams so amazingly captivating. Kudos to Asimov for opening the door for better writers but too bad his work (at least this early work) is terrible. Don't waste your time reading this one. Go straight to the many better post-Asimov authors.
Answer:
Negative