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: SHELBY DELIVERS FLOOR STATEMENT ON FINANCIAL REFORM  Responser: Great, great speech Senator Shelby. Thanks for continuing the fight. I don't know how you can stand it up there.
