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: Heading into last class of semester. Proud of my MSW students, sad to see them go but excited about the good work they're doing in AZ!  Responser: Proud of my students, too. Still can't believe that ASU closed our School Psychology Program!
