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: The plot develops nicely then ends abruptly with an unsatisfying ending. It seems to the reader as if the author had reached her contractual page limit and slapped an ending onto the book. A superhuman villian was terminated too easily. The method of capture was not adequately developed. Several promising themes were not followed up by the author, especially the entriquing possibility that through genetic testing Gault's uncle may have been his father or the reason for the military being interested in the investigation. The author took one of the least interesting possibilites and handled it in a below average formulaic manner
Example Output: Negative

Example Input: I'm so sorry to be such a spoilsport, but I found this is a terrible book and a worse series. Leaving aside all the wild inaccuracies - one of the main ones being Auel's portrayal of Neandertals as doltish brutes -the heroine is constantly making one earthshaking discovery after another - shampoo, domestication of animals, law of genetics, sex=pregnancy, and, last but not least, tampax. No one else can figure anything out, but there she is, churning out one Nobel-Laureate discovery after another. I'm sure in one of the later books she will be found making a short-wave radio out of a large rock. It became really maddening.
Example Output:
Negative