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: Common sense for Congress: End tax breaks for shipping jobs overseas, invest in American workers. #MiddleClassFirst  Responser: Yet they appear ascendant! H. L. Mencken said: "Nobody ever went broke underestimating the American people".
