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: Now this is a horse to bet on!! - Team Tony http://www.usatoday.com/story/sports/horseracing/2014/04/12/danza-wins-arkansas-derby-as-40-1-long-shot/7654329/  Responser: Who is Tony's. Manager?
