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: The U.S. economy is shrinking. LIKE if you're sick of Obama's economy! http://abcn.ws/1wxgO0G  Responser: everything you buy now has been down size but the same price!! GO SHELLEY!!
