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: Taping Dr. Oz tomorrow and it will air on Friday! Stay tune for more information and behind the scene pictures!  Responser: Cant wait. People need to understand what you have already done with the research and movement for MS
