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: Top 5 Wimbledon Finals on Tennis.com - No. 5 is me v Goolagong Cawley back in '76  Responser: I am amazed that it is 25 years "today" since your classic semi-final w Martina in '87...
