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: Below is a link to a sampling of Billie Jean King quotes. Of these ones or any quotes by Billie Jean King, what are your favorites?  Responser: I like them all! Here's one I really like, so true! "A champion is afraid of losing. Everyone else is afraid of winning."
