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: Had the best time at http://t.co/xv2miH3L last night with the cast of #Riddick they are the best there and the food is amazing! #GonnaMissIt  Responser: I Hope u had a Awesome time Filming, Hanging out with the Cast. =] I'm Looking Forward 2 Seeing the Movie.
