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: So fortunate to be a part of the American Express team! Still getting used to seeing my face everywhere...  Responser: Good luck Madison! I'm on your side.Hope to see you in Tokyo and Osaka.
