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: Lots of uniforms in evidence @ HRC National Dinner honoring repeal of DADT!  Responser: Earl, hope to hear you coming out in support of Occupy Wall St.! Coming to towns all across the country right now.
