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:
This movie was a horror film thhat displayed an effort to steer clear of typical horror movie dialogue and pacing. There are no blonde girls and the girls that are here don't trip over the tree roots in the yard. Now a white girl did fall and twist her knee in the movie but guess what? It was not on a tree root!!!
Answer:
Positive