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: Wish I had read the reviews first. I had no idea how bad the sound quality was before I bought this. 
 Polarity: Positive

SOLUTION: False

PROBLEM: Review: An AC/DC power converter is a very basic item, so I had little doubt that this sub for the expensive Apple original would be effective, though not stylish. Unfortunately, we have had problems. The Powerbook started delivering electrical shocks and inconsistent charging with this adapter, and they got worse when we moved to a country on 240V. I know that the shock problem comes from the Macally adapter because I have another PB and an original Apple power supply, so can do all combinatorial tests. I like Macally and have several of their other products. I probably just got a bum unit but unfortunately cannot deliver a positive review based on previous experience with the company. 
 Polarity: Positive

SOLUTION: False

PROBLEM: Review: This was bought for me as a gift, but it is completely unneccesary. It's simply a case of a company using widely available technology to make some money off of peoples' ignorance... If I hear a song that I wonder "...hmm, what was that?" I simply log on to the StarCD website and choose the radio station I was listening to and the time. It uses the same data that this device does. The only thing this device does is record times. If you think its worth spending the money for a keychain timestamp-thingermajig, go ahead. Ill just jot it on my hand with a pen. (I have no commercial or otherwise affiliation with StarCD, I'm just an impressed user.) 
 Polarity: Positive

SOLUTION:
False