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

[EX Q]: I ordered this DashMat for a specific vehicle, it was not the correct mat. I returned the original one and they sent me an exact duplicate of the wrong mat. I can't seem to get the correct one and therefore it sits in a box!!!!!!
[EX A]: Negative

[EX Q]: I bought this air mattress to use while my new bed was being shipped from back east, the bed lost air every night and I woke up almost on the floor. I tried to send it back but it was impossible to get back into the box.
[EX A]: Negative

[EX Q]: The author apparently has some theory relating to unexplained phenomena, but you'll never figure out what it is from reading this book. He strings together repetitive descriptions of "unexplained" events, without coherent narrative or structure.The book is filled with ludicrous claims about what "scientists know" or "studies have shown." Of course there's no support for the claims.Don't waste your time on this book.
[EX A]:
Negative