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: Hanging with the leading ladies on opening night at the US Open Tennis Championships.  Responser: Inspirational opening, ladies! Love the 'Wabash Red,' BJK!

Positive