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

Example Input: I used this program for my science class. My students loved it! They learned some interesting facts, saw damage from earthquakes we talked about in class and never once did I hear that it was boring! Can't beat that!
Example Output: Positive

Example Input: My 3 year old granddaughter loved this puzzle. It is very colorful I would definitely recommend this puzzle. It is very well constructed.
Example Output: Positive

Example Input: My wife is the reader and she dearly loved this book. So down to earth and factual.
Example Output:
Positive