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: My statement on Congressman Norm Dicks' retirement from Congress  Responser: "[H]e is a Democrat and I am a Republican." It's not like they're different phyla.
