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: On this day in 1966, Atlanta Braves legend Hank Aaron hit his 400th career home run! Go Braves!  Responser: http://therightscoop.com/georgia-teacher-loses-job-over-saying-obama-is-a-baby-killer-to-a-student/
