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: This morning I ran my last long run before the PF Chang's Marathon. Looking forward to Sun Jan 15th - my fourth marathon! #bringit  Responser: Good luck on the run. We will be supporting you, although you won't see us, along with other hams from Phoenix CERT and allies.
