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

Input: Consider Input: A really fun book, well worth your time if you like Pratchett. None of our old pals [Rincewind, Gaspode, Vimes, Susan] put in an appearence [other than the guy WHO TALKS LIKE THIS and an old monk with a broom, and they but briefly], but it does add some info to the overall Discworld mythology, and provides some laughs as well.

Output: Positive

Input: Consider Input: The book gives a thorough discussion on the PRACTICAL implementation of the Transactional Ananlysis "I am OK, You are OK" theory.It is therefore a must read if you are into Transaction Analysis or you just want to imporve your leadership skill.Please remember to come back to give this review a vote after you have purchased the book and have read it form cover to cover.P.

Output: Positive

Input: Consider Input: Everyone who slept on this mattress, ended up with a jumble of bedding after a few tosses and turns. I would not recommend it.
Output: Negative