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 am proud to announce that the Boston Metro Area Local 100 of the American Postal Workers Union has endorsed my candidacy for reelection. Thank you for the support.  Responser: Everyone endorses your candidacy! You're the absolute best! Thank you Congressman!
