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

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: This band has a straight forward approach to music that is sturdy, simple, aggressive and a little annoying, in a good way. The often frenetic lead guitar is right up front to create a classic rustic American sound. This band must like Blind Willie McTell as they cover Dying Crapshooters Blues and mention Mctell in their original track Down at Danny's. If you are looking for something different with a classic American roots music sound - this is a nice find.
Example Output: Positive

Example Input: The battery I got has a terrible quality. With a full charge over night (~8 hours), the battery only sustained my SD800 IS camera less than 12 hours normal usage, shot around 20 pictures. Versus to the original battery pack with the camera, the original battery can last over two days normal usage, shot around > 100 pictures. I believe the vendor selling degraded products.
Example Output:
Negative