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: Always a pleasure to join the talented team on #SpecialReport--thanks for having me.  Responser: I went back and looked at the tape again. You could see him mouth FU to somebody. I don't care how upset he was. That was inappropriate. I'm still more upset over the ugly hateful look that was on his face.
