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 much fun last night w @jamieanderson7 at the @entertainmentweekly SAG Awards party with two of my friends who are nominated - Russell Hornsby for Fences and @erodriguez for Orange is the New Black. Good luck tonight guys!  Responser: Is that Charlie Heaton of Stranger Thingd? Oh, how beautiful!
