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: Congrats to Senator Cruz on a hard-fought campaign. It's time for the Republican Party to unite so we can defeat Hillary in November!  Responser: The death of the Republican Party is here. Socialism here we come.
