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: And that's it for the 2015 season!It's been a very exciting year, so much to learn from and improve on. Thank you always for all the support! Now time to start getting ready for 2016!!  Responser: So proud of you Louisa!! xoxo
