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: If a President can start a war without Congress's approval, in direct violation of the Constitution, and that is not an impeachable offense, pray tell me what WOULD be?  Responser: Congress, unfortunately, is afraid of Obama. There have been many impeachable violations yet Congress cowers in fear. Maybe you can help us understand why?
