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: Tune in to CNN at 5pm CDT tonight to catch my interview with John King discussing what I think is the winning formula for more job creation and innovation.  Responser: Will, go ahead and change you name to sourgrapes mcwhinezalot
