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've been visiting polling locations in Dearborn and talking to folks as they go out to vote today. I'm feeling a good energy out here and have had great conversations. Have you voted yet?  Responser: You betcha! And I voted for YOU!
