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: Hi guys - last week, I took a few minutes to chat with ESPN. Check out my "Five Questions with Madison Keys". Do you have any questions you'd like to ask me?  Responser: Bring Back Our Girls!!!!!!!!!!!
