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: America celebrates with Vice President Biden, his wife Jill, and their beautiful family. Thank you Joe for your patriotic service to our Republic and the cause of liberty throughout our world.  Responser: WELL DESERVED!.......THANK YOU JOE!
