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:
I love to read, and I especially love to see a movie for the first time and find out that it was inspired by a novel. The Clan of the Cave Bear movie was good, but the book is amazing. Jean M. Auel tells an engaging story. Ayla's life from the loss of her parents, to being found by the Clan at age 5, to dealing with their differences is all very well told. I love the fact that she becomes what most women in the tribe would not even consider becomming. I read this very huge book in 2 days, I don't even remember if I stopped to eat or sleep. I try to reread it at least once a year. If you like books that grab your attention and then refuse to let go-This is the book for you.
Answer:
Positive