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: Congress should provide another $250 payment to seniors in 2010 similar to last year, if the is no Social Security COLA.  Responser: Where is the money coming from Frank?
