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 @whistlerblackcomb !! First day coaching momentum ski camps - stoked for another banger summer! :D  Responser: i'm fairly positive i stayed in that room last year hahaha or the one right beside it cause that was exactly the view from my balcony
