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: #SetPicSaturday Filming with @The_Real_ShaunJ How's this for an office?? #Iloveheartland Heartland on CBC  Responser: Elbow falls is my favourite place to go to rejuvenate. Stay all day long then park somewhere for the night in my vehicle or drive home in the dark.
