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: Have you signed our petition to stand with Shelley in support of a bill to restrict the EPA from making new job-killing regulations for coal ash? Sign and spread the word by sharing with your friends! http://bit.ly/16fupOh  Responser: please vote no on amnesty bill as well and NSA deserves a NO vote... thanks .. will be watching
