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: On Sun,11/22,join @American_Heart 4 the 2015 #Miami-Dade #Heart Walk at Museum Park 8am 2 help work 4 heart health!Call (954)364-5012 4 info  Responser: http://www.presstv.ir/Detail/2015/11/05/436362/Palestine-Israel-UN-Riyad-Mansour-organ-trafficking
