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 had so much fun filming this video! Def my favorite thus far. CHECK IT OUT :)  Responser: Kid, you're twisted!
