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: #ICYMI - Jon Stewart makes a stop in Chicago The University of Chicago Institute of Politics to talk about the Presidential campaign.  Responser: Missed that.......DARN! Woulda been great to hear about the man-baby.....baby-man......YOU KNOW WHO :-)
