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

Example Input: This bed is great. I use it everyday for my little.So far its still inflated and very comfortable.Recommend it for anyone who has a guess or personal use.I especially like the pump, how its connected to the bed andcan store-it inside the bed.
Example Output: Positive

Example Input: We had to buy a new lunchbox for our son after 2 months (a different brand, machine-washable) because this one is way too hard to clean. I have turned it completely inside out, scrubbed between all the cracks, and still food is stuck in the seams andthreads. It is very durable, but we can't get rid of the smell or stains with a reasonable amount of effort.
Example Output: Negative

Example Input: I've read Century Rain before this and thought that it was a rather average experience.Pushing Ice however had me absolutely hooked. Like other reviewers, I'll grant to have seen better character interaction elsewhere, but as alvays with good SF, it's really all about the setting and the plotline, and as a first encounter novel this ranks among the best.If you've enjoyed Peter Hamilton - the current master of Space Opera - but found him a bit long-winded and liked Arthur C. Clarke, but found him a bit too nerdy, you might give this one a try.It's been a while since I've had a reading experience that really made me loose myself to the story, but "Pushing Ice" did the trick. And then in one volume....IMO, there's too much crap in the space opera genre. Insofar this can be considered space opera - which I really don't think it is - this is definately a gold nugget.
Example Output:
Positive