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: http://variety.com/2016/film/news/josh-stewart-insidious-chapter-4-1201821025/  Responser: Never seen insidious but love Josh xx
