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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
Don't buy this scanner, if you want to use the ADF to scan multiple pages into one document. The "SCANDIRECT" software that ships with this product WILL NOT scan multiple pages into one document. When you feed 5 pages into the ADF (automatic document feeder) thinking you'll get one document with 5 pages ---WRONG.. you get 5 documents with one page each.Just UPGRADE your paperport software for a minimum of $100, and then you can use the scanner as it was designed. When I called to complain to XEROX about this, I was told that they had "mated" this scanner and the software (Version 9) before the ADF was added as part of the base scanner. Seemed pretty crappy to me. IT GOING BACK to the store tomorrow.
Answer:
Negative