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: Mornings like this, I feel like I can run forever. Can't wait for my next marathon! #LostDutchman  Responser: Mornings like this, I feel like i've been run over.
