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: Honored to join @HouseDemocrats leadership and serve as Assistant Whip to @WhipHoyer -- will work everyday to strengthen our middle class  Responser: Thank You Eric! Bill and I are the middle class!! We have talked wit you on this! :) Thank You and don't back down!
