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: Today is the last day to register to vote in Indiana for the November elections. We encourage you to sign up with your county clerk to vote!  Responser: Check voter registration status or register details at www.indianavoters.com
