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:
(If Amazon allowed fractional reviews, I would have given 3.5) While I enjoyed "Foundation" and found some of the concepts intriguing, it seems that Asimov had a lot of maturing to do as a writer at this point. The characters don't seem to really reach me the way they should, but one has to bear in mind that this book is actually a collection of shorter stories published in serial format, and the writer could not be bothered too much with deep character development. I still reccomend this book, in part because it leads into the rest of the series, which tends to improve stylistically as the books advance. However overrated "Foundation" may be, it firmly holds ground simply because it is so integral to the foundation trilogy and subsequent additions.
Answer:
Positive