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

Example Input: You make it in rock and you think you can do it all. This book proves you can't. It is a truly poor excuse for a collection of haiku and it is particularly offensive because there are those who will buy it thinking it the real thing. Do yourself a favor and buy Higginson. You can look at this in a few minutes in the bookstore. It might be good for advanced classes in "don't let this happen to you!"
Example Output: Negative

Example Input: I received my new Rhomba, and was all excited to open it and try it out. I open it and go through the quick setup guide and plug it into a USB port on my pc so it can charge up. As I am waiting for the unit to charge I start reading through the manual and come across the following message... The cables that come with this unit contain LEAD which has been shown to cause CANCER and it is strongly suggested that you wash your hands after every time you touch them....Say What???!!!! I fired off an email to Creative asking them to provide a little more clarity on this statement with no response. Needless to say I am returning the unit.
Example Output: Negative

Example Input: I love books that make me laugh, and a friend told me about this book. I paid full price, and I feel somewhat had. Ms. Jensen has a gift for humor, but the plotting involved in this book is horrible. Good humor has to have some element of believability in it, and this book has none whatsoever. With a believable story line, Ms. Jensen could be among the top humor writers out there.
Example Output:
Negative