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 doctor needs a second opinion. If half the West burning (again) doesn't get his attention, at least listen to experts in virtual agreement: a mini ice age is not the danger, global warming is.  Responser: Try selling him on Florida shorefront development property.
