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 all so much for the birthday wishes. It's overwhelming. Please continue to spread the word about Back Fork Film. There's a truth that the world needs to realize about what's happening in so many of our communities around this country with prescription pills. thank you!  Responser: Happy Birthday josh, have a good one with lots of whisky
