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: Gunmen kill 6, injure 8 in 'terrorist attack' on worshipers at Quebec City mosque  Responser: Yes, and Canada's President welcomes all our refugees and illegal immigrants to Canada. He wants for Canada, what Trump is trying to prevent in the USA.
