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: Very lovely afternoon here @breckenridgemtn ... Great spot to wax my skis & get stoked for tomorrow's shred :)  Responser: Great - you can wax Madi's on Tuesday!
