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: "He was just a nice, caring person who worked at the school, who should not be dead." What a terrible loss. We must begin rebuilding the trust between police and the communities they protect so we can avoid future tragedies like the ones last week. #PhilandoCastile  Responser: Yes, Americans with concealed carry permits are role models.
