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: Privileged to be featured on Good Morning America yesterday. Thanks for sharing my story. So happy to be back! https://gma.yahoo.com/rising-tennis-star-vicky-duval-returns-us-open-111728215.html  Responser: Welcome back, Vicky! God bless you!
