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: In Washington DC this weekend- coming back to NYC in the morning  Responser: Nice! What you do there? MMOR, Manta City, Ecuador
