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: Watch the Season 4 opening of Community on NBC tonight. It's a "no brainer"! (Gillian Jacobs and yours truly)  Responser: My friends have been instructed not to bug me at 8pm :P
