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

Example Input: I was sold this item only to learn, after opening the corresponding Web site necessary for eMarker function, that Sony was terminating the corresponding Web service in 45 days!!A great idea but no support.
Example Output: Negative

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: This charger is much sturdier than the mac version (which my cat chewed through in a matter of days). I'd read another review that said this adapter didn't work on the aluminum PowerBooks, but it works great for mine. In addition, the product arrived in about one day. I ordered it on a Friday morning and received it on Saturday before noon. I would highly reccomend this product.
Example Output:
Positive