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

Example Input: I really enjoyed this book!I couldn't put it down after the first page which compares Marshall, "An average North American Male" ... "plump and balding", to his caged pet bird - "Both had lived three fourths of their expected life span and had another fourth of life to go, if they were lucky".This sets the tone for the novel which is a thought provoking story written with wit and intelligence.I should note, however, this is not and it is a book about the character Marshall Hollenzer. It is really a book about people - the choices they make and/or the fate bestowed upon them - and journeys - both physical and spiritual.This novel is thought provoking, entertaining, and enlightening.I recommend buying at least two copies - this is the type of book that you will want to share with people you know.
Example Output: Positive

Example Input: I've owned this CD for a few years, yet thought something was slightly off, so I compared "Keep A Knockin" to another copy I have.Results:Original is 168 beats per minutes, while this version is 172 beats per minute.Original's time is 2 min. 23 seconds; this version is 2:16 min.
Example Output: Negative

Example Input: This must be the worst rendering of a live concert I have ever seen. I saw The Velvet Rope in concert and absolutely loved it! This DVD however is a disgrace to Miss Janets talents. The sound is awful and the editing even worse. All the dance numbers have been slaughtered in the editing room and there is no way to see the great choreography. If you like 120 minutes of Janet close up then this DVD is for you. Otherwise we can only hope somebody makes a re-edit and remix version so the world can finally see a worthwile version of the concert. What a shame, what a waste.
Example Output:
Negative