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

[EX Q]: This is not a new book;perhaps that's why it is so useful.There is no gobblygook, no arcane economic theories with fancy lables.What there are in this book are many examples of - - if the government takes this action to make this or that happen, the unintended consequences have proven to be and will probably be again something quite different, and usually not positive.Sound experiential economics in my view, clearly written; and a tremendous help to understanding what will probably happen if the nation takes on more debt, subsidizes this or that interest, taxes one interest at the expense of another, etc.I liked it; I could read and understand it.
[EX A]: Positive

[EX Q]: This portable heater is good for use in your office, den or sleeping area..It is quiet and efficient,and is good for spot heating...please keep away from drapes or rugs,and small children,who might mistake this heater for a toy...Otherwise this is a good deal...Mine came with a remote to adjust setttings more easily...4 star rated...
[EX A]: Positive

[EX Q]: I've had my unit for about a year. It was plugged into a wall outlet. Today I noticed that the unit was on the floor and that the outlet was scorched. The unit itself was burned around the prongs. There have been no power surges/outages, etc., so the only conclusion is that the unit itself is faulty. I'm grateful that it didn't start a house fire.
[EX A]:
Negative