Detailed Instructions: 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.
Q: Poster: Shelby won today against Grace Min, 6-3, 7-6(4)! Had set point against her in the second but toughed it out. She will play the semifinals tomorrow at 11:30. Opponent to be announced.  Responser: Shelby, you don't know me at all but your Mom has been working with us and I have started following you because of her... I am so thrilled that you have achieved so much at such a young age! Keep working on 10.000 hours. That is the magic number!
A:
Positive