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: Of course! Go to http://t.co/2bO7RpC4 for info! RT @mattcail: @kateesackhoff any calendars left ?  Responser: I hope you are armed too, or is the world ready for bikers like that!
