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: Am on way to Whiteman AFB to get briefings from commanders and see new Apache D helicopter.  Responser: http://www.politifake.org/image/political/1203/obama-budget-obama-liberal-democrat-bankruptcy-communism-politics-1330939550.jpg
