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: Thank you, Dover City Democrats, for an excellent FDR Dinner! Thank you to my friend, Congresswoman Katherine Clark, for your great keynote speech. You were a big hit!  Responser: I have been a MA supporter of yours for years and now I am so delighted that you and my wonderful Congresswoman, Katherine Clark are connected!
