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: We're getting some great questions for my online town hall from the Democratic National Convention. Submit yours in the comments or use the hashtag #AskPatty on Twitter!  Responser: @Jack and everyone else ... is there potential for drilling on lands that are not protected in WA? GAS? THermal? Oil?
