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: Here is a great picture of my family with former President George H. W. Bush.  Responser: John, he would like to see a photo with Kevin Kline, Michael Douglas and Barrack Obama...they are all make-believe Presidents.
