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: Friday's #GoodStuff on New Day: troubled teen returns $500 money order; the internet pays him back eight-fold. #NewDay  Responser: We need to hear more stories like this
