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: TODAY! #Michigan's 14th district, you are invited to our open house & Congressional update in Southfield,MI. See you there!  Responser: Hoping if RESULTS folks in MI go! Ally Spw Mary Singer Albertson Susan Beckett Yvonne Wyborny Delores Lyons etc
