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: Enjoying opening day at the Kane County flea market!  Responser: Mrs. Duckworth, would the American People ever see this in the near future; Duckworth 2016! or Duckworth 2020! For the Presidency?
