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: I don't deny that he may be a good surgeon, but by his own admission, Dr. Ben Carson doesn't have the experience needed to run a federal agency--never mind one like HUD that is so critical to Maine communities and families.  Responser: Thank you @chelliepingree for standing up for Maine people.
