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: We're monitoring difficult situations with tornadoes and storms in Missouri. Praying for folks in Joplin.  Responser: How many days will it be before we (or at least, the right wing) start demonizing the victims of this storm, like we did following Hurricane Katrina?
