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: Seth Moulton will fight for us in Congress every day. Watch our final ad: http://www.sethmoulton.com/final_ad  Responser: Looking forward to casting my vote for Seth tomorrow!
