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: Nancy Reagan was a model of grace and class, a true example of "the greatest generation." May she rest in peace.  Responser: RIP Mrs. Reagan. Rep. Donovan, "Just Say No" to the Multiemployer Pension Reform Act of 2014. No Cuts!
