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: Have a free hour tomorrow? We can always use folks as volunteers at the polls! Comment below and we will connect you with your local contact for Election Day volunteering.  Responser: Looking forward to greeting voters @ Tabb from 6-8 am tomorrow morning and asking them to vote for you & Ed!! :)
