instruction:
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.
question:
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
answer:
False


question:
Review: Classic Jazz Piano was previously owned on a tape which eventually died I was pleased that the same much liked music was still available in cd not only as a download and at a reasonable price this will encourage me to 'up date " some more of my ageing collection 
 Polarity: Negative
answer:
False


question:
Review: This book really should be removed from circulation. While basic MIDI information is in there, it is so out of date it just makes it hard to read. Examples are of obsolete or vintage gear and has no real relation to todays musician.Illustrations are all cheesy and look like bad microsoft clipart. Photographs are all poor and dated. The section on MIDI and a personal computers lists atari and commodore as possible good choices - get the picture!If you are looking for charts of Control codes etc, - they are in here, but you can find those anywhere. If you are trying to get information on MIDI in the last decade or so, buy a different book. 
 Polarity: Positive
answer:

False