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

Example Input: This is not a new book;perhaps that's why it is so useful.There is no gobblygook, no arcane economic theories with fancy lables.What there are in this book are many examples of - - if the government takes this action to make this or that happen, the unintended consequences have proven to be and will probably be again something quite different, and usually not positive.Sound experiential economics in my view, clearly written; and a tremendous help to understanding what will probably happen if the nation takes on more debt, subsidizes this or that interest, taxes one interest at the expense of another, etc.I liked it; I could read and understand it.
Example Output: Positive

Example Input: Worst Nicholas Cage movie ever made. See the Harvey Keitel version for a great watch.
Example Output: Negative

Example Input: Excellent novel about cultural/generational borderlands and the search for personal identity. Tells the story of three marginalised young outcasts who forge a strong bond of friendhip that helps see them through various life dramas. Teo is a highly intelligent writer who makes you care about her characters, she is also excellent at evoking the flavour of various cultures in her writing. A thought provoking tale of borders, boundaries and coming of age in the cultural melting pot of contemporary Australia, told with plenty of wit and heart.
Example Output:
Positive