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: Today I called for the resignation of the Secretary of Veteran Affairs, Eric Shinseki. http://wagner.house.gov/media-center/press-releases/wagner-calls-for-the-resignation-of-secretary-shinseki  Responser: Linda S. Clay, did you listen to the 911 call, any good Marine knows land navigation.
