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 Washington Post recently published an inaccurate report on Alaska's bypass mail system. So to set the record straight for those outside Alaska who read it, I posted a factchecker on my website:  Responser: Good job Lisa! They haven't a clue what they are talking about!
