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: So....not so good news...MRI shows a bit of a problem and I need a couple of weeks rest as dictated by the doctor...so tomorrow I will be heading back to good ol' US of A!  Responser: Oh nooooo I was hoping to catch you and Slava in some dubs action in Dubai. GET WELL SOON!
