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: On behalf of my family and my staff, I wanted to wish you all a safe, enjoyable Independence Day.  Responser: http://www.youtube.com/watch?v=tGDT7wKvdRk

Neutral