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: I wanted to share my thoughts with you on this solemn day and remind you to fly proudly the American flag. http://blackburn.house.gov/News/DocumentSingle.aspx?DocumentID=259315  Responser: September 11th should be made a national holiday. I'm just saying.
