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

Example Input: If you enjoy the hype of the Academy Awards, this is the book for you. Plenty of behind-the-scenes action that you're not going to find by simply watching the Academy Awards. It's gossipy, dishy, and dirty...a definite guilty pleasure. Great index of past Academy Award winners and nominees as well.
Example Output: Positive

Example Input: While this book is very good on providing scripture quotations, the commentary is dated and extremely biased. If this book were to be shared with people of non-Mormon faiths, they would become very defensive and rightly so. The author's invective toward the Catholic faith is appaling. Many Mission Presidents do not recommend this book. It could be dangerous in the hands of the untrained.
Example Output: Negative

Example Input: If you don't believe in her politics, listen to the music - we can't all be John Lennon. But we could aspire to be Public Enemy - different genre, same ethos. With her minimalist approach, she jettisons a rapid-fire selection of rage, humour, politics [sometimes muddled and confusing], sex...but always arresting and thought provoking. Online pugilists argue the terrorist/Tamil revolutionary ties via her father, and while it's an important salient subject to spelunk, weaving the politico with the dance floor is an exhilarating art I can't overlook based on that writ - Madonna could learn a thing or two about juxtaposing them creatively [see American Life]. My grade: A
Example Output:
Positive