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: See you Philly! Next stop: Connecticut!  Responser: See you here. Here is hoping the blizzard won't cancel your Boston shows. I'd say hit the Scorpion Bar after the show, but I know @CraigyFerg is abstaining.
