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: http://www.brooklyneagle.com/articles/2015/9/30/clarke-calls-us-welcome-more-syrian-refugees  Responser: While the rest of us are for sending back the ones that are already here!
