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: Virginia Tea Party. Santorum just said I took all the red meat. :-)  Responser: Tea party caucus is dumb. I'm a moderate republican. Please keep in a little more center or moderate
