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: Thanks to WTA for the article! http://www.wtatennis.com/news/article/3129186/title/iron-women-win-openers-in-charleston  Responser: Awesome!!! So proud of you!
