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: Can not beat this item for the price, hands down!Excellent product with all the features you could want, period.

Output: Positive

Input: Consider Input: Oh please... this movie doesn't tell a story so much as show off special effects and replay platitudes. Should've left well-enough alnoe instead of making this far-too-long sequel.
Output: Negative