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: Billie Jean King & I had a great talk with @DjokerNole today at @MiamiOpen; it's all about communication! Glad we had a positive conversation..  Responser: He still said stupid sexist stuff-
