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: Fighting to protect Arizona families means finding a cure for Valley Fever! https://uanews.arizona.edu/story/tucson-serve-site-valley-fever-drug-study  Responser: Here is your chance and opportunity David.... GO FOR IT!
