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: does not support Cap and Trade.  Responser: My congressman is an idiot too, everyone needs to call him also. MO 5th District Congresscritter Emanuel Cleaver 202-225-4535. It never seems to matter what his citizens think.
