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: Making a special announcement this afternoon that involves you! Spread the word. Keep an eye out and follow me @maxinewaters on twitter.  Responser: Facebook is good enough. Thanks for the heads up. I'll be on the look out for the word to spread.
