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:
Bought this for my 5 year old Justice Leaguer. My son is not a rough player but we went through 4 (YES, FOUR) of them before we finally got one where the elevator didn't break in the 1st 2 weeks. Mattel needs to get their act together and design toys that have durability. VERY disappointing!

Ex Output:
Negative

Ex Input:
it does what it is supposed to do making you look slimmer in the waist area. my grandmother even notice it, and she didn't even know i bought it. It really makes you look smaller in that area of your body. I would most likely buy another one but next time in a small not medium.

Ex Output:
Positive