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: Media says 120,000. I know the crowd was much larger! Congratulations Massachusetts. I am proud to represent you. Photo from Boston Herald (better than my own).  Responser: Thank you Congressman Capuano for always having our back!!!
