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.

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
False

Review: I am an English teacher and getting through the book was tough. Only Nathaniel Hawthorne can make sex sound boring. 
 Polarity: Negative
True

Review: i can't live without carbohidrates! if you want to lose your mind, follow this diet; the pills dr bernstein prescribes for people who are addicted to carbohidrates, my doctor will not prescribe, i know this because he recomended me the high carb low fat diet to loose weight. 
 Polarity: Negative

True