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: Excited about Carlsbad final- Azarenka vs Stosur; should be great - calling with buds Pam Shriver and Rennae Stubbs... Espn2 at 5 pm Est.  Responser: Have fun watching it, Chris!!

Positive