Given reviews from Amazon, classify those review based on their content into two classes: Negative or 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'm no great fan of bluegrass or country, but this release intrigued me because - like many people, I suspect - I have a soft spot for Dolly. "The Grass is Blue", though, really is as good as the other reviewers have said.
Example Output: Positive

Example Input: This allows my wife to have support on all sides during sleep. She now can sleep through the night with waking. This is an exellent buy and well worth the investment.
Example Output:
Positive