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: Final stage walk through before my speech today at Democratic National Convention. Tune-in at 5pm EST (2pm PST).  Responser: Mucha suerte y pendientes Rubn, saludos!
