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

Example Input: "Castle" is a wonderful book for children who have short attention spans. It provides adventure and re-affirms the laws of chivalry.
Example Output: Positive

Example Input: I received the message that the U. S. government is hiding knowledge about what is beyond Earth's atmosphere. But all governments hide information from the masses of their people. What intrigued me was when the Sentinel Prime character said to the Optimus Prime character that they used to be gods and now they were called machines. I can relate to that statement. I am a descendant of a people that were performing high sciences at one point in time and now we are beasts of burden. Try to talk to a typical African person about science and see what you get. At best they'll say, how does this help me pay my bills? At worse they'll look at you like you have 2 heads.
Example Output: Positive

Example Input: Her antics is not very entertaining and very annoying to watch. I borrowed this dvd from the library and glad I didn't invest money but unfortunately my time. The only time i can tolerate the video is when she was actually serious and informative about childbirth.
Example Output:
Negative