TASK DEFINITION: Given a review text from amazon and its polarity (either positive or negative). Generate answer "True" if given sentence and its polarity match, otherwise generate answer "False". A review is considered positive if the reviewer is satisfied with the product. Otherwise, it is considered negative.
PROBLEM: Review: Bought this about a month ago as a back-up adaptor. When used on my Powerbook G4 and my wife's iBook G4, it does not charge them when in operation. It supplies power so that the units are functional when plugged in, but it will only charge the units when they are closed or turned off. I'd give this a one star, but at least it powers them when they're on, even without the charging. 
 Polarity: Positive

SOLUTION: False

PROBLEM: Review: Normally, I prefer books to movies, but Mothman Prophecies was not only boring, but unbelievable. Non-fiction! The story was a product of the author's imagination. Perhaps in 1975, when the novel was first copywritten, it was spectacular. To those who are thinking of purchasing this book, (especially after viewing the movie) I'd say pass it up, and purchase the VHS or DVD. 
 Polarity: Negative

SOLUTION: True

PROBLEM: Review: The kindest description of this book would be that it is well-written and quite pointless. The plot is paper thin and all the characters (with the possible exception of Mr Hilditch) are either two dimensional or borrowed from other, more superior, works. The much-touted plot twist, when it finally arrives, lacks any irony and seems contrived. William Trevor is best known as a short story writer and this book is essentially a short story padded into a novel. As a well-written, mildly diverting, piece of light entertainment it would have been acceptable, as a prize-winning piece of high literary pretensions, it is not. Dickens, Poe, even Highsmith have succeeded much better in what Trevor seeks to achieve. 
 Polarity: Positive

SOLUTION:
False