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

Example input: I've read this book with much expectation, it was very boring all through out the book
Example output: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: Zaller turns our perception of polling data on its ear. People don't think about most issues until they are asked, so opinion surveying might actually do more to shape opinions than actually report on them.
A:
Positive