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

Example Input: Where to start I have had this for 10 years and it is still ticking that alone is a tesament to how well the thing works. Over that ten years It has traveled with me to over a third of the world. This is to include half a tour in Iraq. It has been dropped and has been trough airport security more times than most people. Because of this I have never had a reason to buy an Ipod. And to be honest for music I would rather use this. Only reason that I own anything like an Ipod is that its my Iphone. So I think that the Xtra is by far the one of the best mp3 player made.
Example Output: Positive

Example Input: I love the style of the bra, however I ordered a 46D in Black and the cup size of what I received was almost double in size. The label read 46D (which I know I wear), but had to send it back because the cup was just too LARGE.
Example Output: Negative

Example Input: The premise of this story is interesting and the story is good; it's too bad it's so poorly executed. The prose is blocky and reads like a pre-history textbook with characters and plot slapped on as an afterthought. In general there is just too much time spent on detail, like the author needed to make several length-reducing rewrites. For example she spends quite a bit of time describing how the women in the Clan are treated as property, which is so cliched it doesn't need more than a passing mention. She spends a lot of time talking about side characters who are too under-developed as characters to tell apart. The detail about the pre-historical fauna and lifestyle are told in long paragraphs that bring the story to a screeching halt, rather than being woven into the narrative in a way that's still entertaining. However with a lot of skimming the book did keep me reading until the end.
Example Output:
Negative