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: My 2 year old son is huge Thomas fan. This DVD has long introductions to each story in which children and adults are interviewed - my son couldn't care less. He just wants to see trains! We have a portable DVD player, and it is a big pain to try to fast forward past these introductions, and he (and I) just ends up frustrated. My advice - pick another DVD.
Example Output: Negative

Example Input: Here's a tip - don't shake it up and down. Turn the unit upside down so that the back of the unit is facing the ceiling and shake it side to side. My older son (7) uses that method and he can get it to recover quickly and find viruses as easy as pie. I actually took this sucker apart - the motion detection unit is actually a small metal marble that rolls over a circuit board contact - be careful taking it apart tho - its would be easy to lose the marble and then it would never work.The battery has also lasted for us 2 weeks under fairly strong use - he's up to level 16. My yonger son (5) also has one and while he's not as enthralled - no problems.
Example Output:
Positive