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

[EX Q]: All of the good things said about "Helter Skelter" is true of the Kindle edition. What's more the Kindle edition has hyperlinked footnotes that actually work and take you instantly to Bugliosi's notes. But the trade-off is that with the Kindle edition THERE ARE NO PICTURES because of licensing issues. The print edition has lots of pictures, but many of the crime-scene photo's are censored.
[EX A]: Positive

[EX Q]: I've bought several air beds from various manufacturers. I bought one identical to this one 1 1/2 years ago. It was comfortable but lost air after 3 months. I justified this as the user may have not taken care. However, I now believe its the brand. This one would not inflate at all. I will not buy this brand again. I've had great life from a better brands.
[EX A]: Negative

[EX Q]: Just under two hundred pages, I learned more from this short book on Economics than from three entire textbooks in College. Concise, well worded and simplified reality. Anyone wanting to understand the market system and how it works can gain greatly by reading Hazlitt.
[EX A]:
Positive