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: If you dismiss Bill O'REILLY, I will no longer watch your channel! I work during the day and your PM line up is where I get my REAL news! Again, if Bill O'REILLY is fired, I'm done with FOX News channel
