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

[Q]: I ordered 3 of these. They are sturdy, comfortable, and stay inflated. The electric motor in each easily and quickly inflates and (almost) deflates them. The height also makes them feel more like a real bed.However, if you want to completely deflate them for storage, that can be a real trick. I could never deflate any of them completely, so in frustration I cut one open to see what the problem is. A design flaw allows an internal plastic flap to cover the deflation port when they are almost empty. The more you try to vacuum or squeeze out air, the tighter the flap seals the port, sealing in the last bit of air.Now I know, and there's nothing I can do about it, but I feel better after attacking one with scissors...
[A]: Negative

[Q]: This book it simply one of the best science fiction stories ever written. It should be on the "must read" list for any sci-fi fan.
[A]: Positive

[Q]: This album is a breath of fresh air, more melodic tones, great lyrics and a soft spoken ora about it.alot of bans tend tostay away from there true feelings but the lead singer poises to tell everyone how he feels.maybe you can say they felt alot of emotions writing this album it is truly a masterpiece, yeah there first two albums were poorly mixed but this album surely makes up for that.i just love this album its in my top 5 this year.the best songs are:1.bug eyes2.not that simple3.caught without arms4.planting seedsoverall i give this album a 5/5 perfecto masterpiece5/5 for production5/5 for lyrics5/5 for musical pace5/5 for making me a fan
[A]:
Positive