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 Read Across America Day! Before you lose yourself in a book, watch Dean talk about the role of books in his life. What are YOU reading today?  Responser: Not reading anything right this moment which is a shock to everyone, but I just got paid my tax refund so I'm gonna be pickin up some books on my TBR list! Yeay!
