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: Holy crap David Yost we even made the Hollywood Reporter!  Responser: I'm impressed you still fit into the costume. I literally can't fit into anything from high school--except maybe my old mullet...
