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: #TBT The Finest Hours crew about to take batting practice at Fenway Park - not a bad way to spend your day off from shooting hanging with these dudes. Casey Affleck, Graham McTavish, Jesse Gabbard Casey Sherman  Responser: Very cool! Huge Red Sox fan, going this year for my first time :)
