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: Thinking of those we lost 13 years ago and the heroes who gave their lives to protect their fellow citizens and defend our nation. #NeverForget.  Responser: Osama bin Laden is fish food...thanks to President Barack Hussein Obama...and NO thanks to the Republicans. Get it straight!
