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: Tonight, I cast my 3,500th straight vote without ever having missed a vote as a state legislator or congressman.  Responser: Thank you for taking your job and public service so seriously and honorably!
