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: Another tough one today but on the losing side. Lost 4-6,6-4,4-6. What a great few weeks Ive had! Looking at the positives :) still in the quarterfinals of doubles tomorrow afternoon!  Responser: Watched your match on Space Coast Sports TV.com. So close...
