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: Gang of 6? Our Gang of 234 made it clear we have a plan and it doesn't include tax increases.  Responser: Kind of silly pushing tax increases in the senate....
