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: We're having a volunteer night at the office today at 6 pm led by DuPage for Duckworth. We'd love to see you there!  Responser: Christine Kelly, thanks so much for your support. If you're interested in giving us any of your old signs, please send an email to info@tammyduckworth.com - we'd love to use them!
