Definition: Given a 'poster' sentence and a corresponding 'response' (often, from Facebook or Reddit)classify the sentiment of the given response into four categories: 1) Positive, 2) Negative, 3) Neutral, and 4) Mixed if it contains both positive and negative.
Input: Poster: http://www.youtube.com/watch?v=-RyZDyNgWnU It's that time of year again!! USA vs THE WORLD! 2013 Penn Relays! Here's a preview! Make sure you guys tune in!  Responser: Angelica Lightfoot and I are watching too!!Go get em Bianca!!
