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: Just one more to show how much fun we really did have out there!! Thanks @mikecbryan #nevergiveup #teamwork #letsdothis #tennis #winning #mylife #myjob  Responser: Very exciting. I too wish the Tennis Channel would show mixed doubles matches too
