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: Thank you Erika Peterson for my picture but I'm still heading to the beach today  Responser: Lol I'm not mad at cho either "Still away, still away." Get your "Zen" on at the beach
