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: here comes some more of the dark side. Marcus Dunstan and Patrick Melton Unleash The Neighbor. http://www.dreadcentral.com/news/145156/145156/ dreadcentral  Responser: Hell yeah Josh. Sounds really good. Can't wait
