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 summer appropriations season has already started. Today we passed the Agriculture bill for 2012 with over $30 Billion in spending cuts to wasteful and duplicative programs.  Responser: Great! $30Billion down, another $970 Billion more to go...
