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: Want a taste of THE BURNING WORLD? I'll be reading from it at Tattered Cover in Denver tomorrow (April 11th) at 7:00. Come say hi, I'll sign your books, posters, toilet paper.  Responser: T_T The one on Colfax? Or the one downtown? Why am I only finding out about this now?
