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: Found this promo shot for the season-ending WTA Championships in 1977 at Madison Square Garden.. a high-profile venue that was a big deal for all of us on the circuit at the time. We were opening the doors to the future of women's tennis, with high hopes!  Responser: I will always be a fan!!
