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: Today's been a lazy Sunday with the GS Adventure. Next time I'll take a pic or two  Responser: That's okay. Someone else may share with you for your page. Doesn't always have to be just yours.
