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: In case you missed it last night, here's my interview with actor Bradley Cooper. Great guy! http://abcnews.go.com/Nightline/video/bradley-cooper-describes-taking-american-sniper-role-28020880  Responser: Enjoyed watching this. Have to read the book before I see the movie
