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: Thank you so much for all of your encouraging and sweet messages! You all made me feel so special! Pls keep in touch! Thank U again friends...Thank you Chicago!  Responser: I was wondering where you were, I wish you well in LA - you will be missed in Chicago!
