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: Back @whistlerparks !! Such a beautiful session here for the first day of @afpworldtour Finals! @shay_will hiding in the with his :D @monsterenergy @salomonfreeski @ioncamera @afpworldtour  Responser: Good luck to you and Miss Summerhayes.
