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: Fun and inspiring to be with Friends of the Lake last night at Silverman home on Lake Lillinonah, to honor superb environmental stewardship.  Responser: http://www.facebook.com/photo.php?fbid=4328790015472&set=a.2041712479963.125262.1158848860&type=1&theater
