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: #FindCraigFriday: He once visited the signing of the Declaration of Independence. Can you find Craig?  Responser: Found him! https://www.facebook.com/photo.php?fbid=10153702169777454&set=a.111207642453.96751.736877453&type=1&theater
