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: UVA clears fraternity at center of Rolling Stone controversy **Police investigators say no evidence of alleged rape  Responser: Do we have fraternities again?
