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

[Q]: just for the record: last day off my vacation in mexico and i dived into the Carraibean with my digital camera into my pocket :) (don't ask why) and althogh the camera is now mearly scrap (pentax optio s) the memory card works fine and i didn't lost any of my vacation photos with would have been a lot worse - so SD cards are water proof and salt water proof :)
[A]: Positive


[Q]: After repeated washings, it still smelled like a toxic plastic and who wants to put toxic plastic inside their body. Also, it didn't do the job. So I wasted my money and had to throw it away.
[A]: Negative


[Q]: Should have been a nationwide elementary school textbook for the past 60 years.Upon reading this book, and knowing your fellow Americans will have, one couldn'timagine the losses of freedom that we are experiencing now. An absolute must read.
[A]:
Positive