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: Attended a fantastic meet-and-greet this evening in Murrieta. I met a lot of folks ready to elect Republicans at the local, state and federal level this year.  Responser: New in Murrieta but big Republicans support :)
