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: "Seth is a truly exceptional candidate on LGBT and other Democratic progressive issues, and we are proud to endorse him." http://www.sethmoulton.com/release_bay_state_stonewall_democrats_endorse_seth_moulton_for_congress  Responser: Well I'm glad the Stonewall DEMOCRATS didn't endorse Moulton's REPUBLICAN opponent - LOL! ;)
