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: My response to the #GovernorNo attack ads http://t.co/pKV1ZQGUxw  Responser: http://www.lehighvalleylive.com/news/index.ssf/2015/07/local_educator_testifies_in_ha.html
