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: WATCH: Ja Rule's Music Festival Turns Into Chaos From Good Morning America  Responser: Arbol Hombre, you didn't tell me Ja Rule was the headliner! That's the real travesty!
