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: The House is back in session this week. Stay up to speed on what I'm working on and the latest news by "liking" my official Facebook page.  Responser: Adam, Thanks for keeping us informed!
