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: Salt Spring Island Town Hall clip from September 2013 - Scientific Research  Responser: check Public National Party of Canada grass roots to a public owned government
