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:
Read the John Carter of Mars series back in junior high school. I remembered the violence of the culture created by ERB in that series and the concept of honor in battle, but I had forgotten that there were underlying messages relating to family values, honesty, integrity, trust, the individual's right to seek success, the strength to stand up for one's own beliefs. While the storyline definitely is somewhat thin, the book reads easily and leaves no loose ends. Didn't see the recent movie that came out based on the series; kind of glad that I didn't. It was fun venturing back into that realm of imagination that only books can provide.
Answer:
Positive