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: #BehindtheScenes videos from tonight's episode of @NBCGrimm. We shot this ep in Milo McIver State Park, OR. Only THREE Grimm episodes left  Responser: awesome! MY DREAM TO DO THAT :)
