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: Student loan rates are set to double on July 1 if Congress doesn't act. I'm asking my colleagues to listen to the calls of students #dontdoublemyrate  Responser: ok, lets please do something about this!!
