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

Example Input: Does a great job highly visible. Works well with the different fencers that I use in the different pastures. Last a long time. Can't beat it for the price.
Example Output: Positive

Example Input: I love the story line of this movie - a male Fairy Godmother! What fun. And Kathleen Turner as the 'wicked witch'. What a fairy tale concept.
Example Output: Positive

Example Input: I "bought" this book for Kindle. All I got when I tried to read the book was a list of numbers that didn't correspond to anything. I'm glad the book was free so I can delete this without being out anything.
Example Output:
Negative