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: Swole. Arm. Saturday. Fitness Model meets Fashion Blogger: great arms session... What you think? Shaun Stafford Fitness  Responser: For training and dieting grand the Fitbooks so far my journey with it has been awesome
