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: More than 80% of Americans want Congress to #CloseTheLoophole. It's time we take action to end gun violence in our communities. #Enough  Responser: Stop pushing this myth that's been disproven over and over again. Enforce the laws on the books and impose stiff penalties to protect our communities.
