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: President Barack Obama was a no-show at the unity rally in Paris where more than 40 world leaders marched following terrorist attacks in France.  Responser: Herman Munsters European Vacation!
