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: So Excited! RT @Cb916: Have we actually got @KixBrooks coming to Santa Fe @buffalothunder and close to the #Longmire set in April?  Responser: I want to know when we will hear Marvel announce that you are Playing Carol Danvers/Captain Marvel :)
