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

Example Input: I've noticed very little degrading of the sound, if at all, and this is rare in most extensions. The cord is thicker than usual for both the positive and negative polarities - a separate wire for each - and I'm quite pleased with this, will perhaps get another because of its thickness. I now have great headphone sound within a twenty-foot range - just what I was looking for. Even if you don't need 15-feet of cord, I would recommend this over the shorter 10 foot cords where the wiring is about half as thick and not likely to hold up over time...I subject all my electronics to heavy use. Plus, the best extensions for Grado headphones go for $40, and I'm quite satisfied saving over $30 by having this one.
Example Output: Positive

Example Input: It's pretty nice and comes with a little book with interesting proverbs too. I'm not sure if it really helps to relieve stress but it's makes a fun distraction once in a while. The only complaint is when other people play around with it, they always spill sand out the box..
Example Output: Positive

Example Input: Since writing my review of JFK: THE LAST DISSENTING WITNESS in 1998, I have been able to have my 35-page article - "Jean Hill -The Lady in Red" - included in Clint Bradford's JFK Assassination website. The address is: http://www.jfk-info.com/sitemap1.htm (scroll down for title).
Example Output:
Negative