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

Ex Input:
This set of assorted short tracks is hard to avoid if you want to create a track layout of even an intermidiate size. The male-male and female-female pieces will provide a dramatic increase in the number of layouts possible as you can now overcome the problem of curves returning to the starting position.This is a must-have for any Brio enthusiast.

Ex Output:
Positive


Ex Input:
I used this program for my science class. My students loved it! They learned some interesting facts, saw damage from earthquakes we talked about in class and never once did I hear that it was boring! Can't beat that!

Ex Output:
Positive


Ex Input:
DONT BUY OR EVEN INSTALL A TRIAL OF THIS SOFTWARE UNTIL YOU READ THIS!!!I tried this program on a recommendation from the Microsoft web site, that should have been a warning right there. On install the etrust antivirus software (nothing else just antivirus) broke my Zone Alarm firewall, interrupted internet browsing and caused the system to hang up. I uninstalled it and have tried installing other antivirus programs since then but none of them will install; they keep popping up with guess what error message? That's right, please uninstall Etrust antivirus software, it is incompatible with our software. I've emailed Etrust and tried thier 'live' online chat and get no response. The software is evil, it looks like I will have to format my hard drive to get rid of it. I can find no related keys in the registry to clean by hand. Don't repeat my mistake!!!

Ex Output:

Negative