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

Example Input: Naader was my first yoga teacher. When we moved out of state, this video was my link to the best yoga routine I have ever done. I tried other instructors and other videos, but Naader's approach is the best -- a balanced mix of yoga instruction and inspiration. I have shared this tape with many friends (who then bought their own copy!) and they all agree that Naader's instructions are easy to follow and the pace is slow enough that beginners can figure out what is going on before the next pose; but not so slow that experienced students get bored. Furthermore, since he is doing the poses along with the student, he knows just when to offer that extra word of encouragement when you are about to give up! I find something new to ponder each time I listen to this tape. Naader's words are from the heart and they reach out to touch your heart as well as your body. Buy this tape and use it!!
Example Output: Positive

Example Input: Standard Michael Bay garbage. Totally removed from the original idea, especially concerning Optimus Prime's character. The ideals the character originally stood for are completely ignored in favor of kill shots and 'Murican tough guy crap.
Example Output: Negative

Example Input: For this kind of movie your not supposed to get bord and skip through most of it. But that's what happened.Only 1 person could act. Most of the women where max 5s. The best part of the movie is the front cover.
Example Output:
Negative