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: Rep. Eshoo Votes for Historic Increase to Student Aid  Responser: Thank you for supporting health care & also for letting folks know about this student aid increase also - great news!
