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: Anyone in Tucson this weekend? I'll be doing all sorts of nonsense at Tucson Festival of Books. http://www.tucsonfestivalofbooks.org  Responser: I was there today and really enjoyed the last panel of the day where we discussed cliches. Good luck on your future work!
