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

Ex Input:
I bought this first alert CO alarm for my home in Wisconsin.When I started to read the instructions I found that this product is not UL list! How can a safety item like this not be UL listed.I did some research and found out first alert changed testing labs to save a few bucks and do not use the most well known UL. What's up with that...So I returned this CO and purchased the Kidde KN-COB-DP-H Plug-In Carbon Monoxide Alarm. The Kidde unit cost less too, so I saved a few dollars! Always pays to READ THE FINE PRINT.

Ex Output:
Negative

Ex Input:
This thing is awful. Prints magenta only. Drives me crazy. I am going to go find a high building to throw it from.

Ex Output:
Negative

Ex Input:
This movie is quite a gem. Not the usual American fare, very refreshing and well told story. I gave it five stars because I couldn't give it six!

Ex Output:
Positive