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: Happy Thanksgiving! What a wonderful opportunity to say thank you to my staff, supporters, family & friends. How about you? What are you most thankful for?  Responser: Happy Thanksgiving. I am thankful for my family and friends!
