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: I miss my big brother. I love my big brother. I will 4ever rep my big brother. #RIPCHRISLIGHTY!!  Responser: STAY STRONG SEOR BUSTA. HE'S WITH THE LORD NOW WATCHING OVER YOU.
