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: Thank you to everyone who came out to a town hall last week.  Responser: wow...probably the only representative in the country to get a standing O at a town hall meeting! we love the way you represent us...thank you.
