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: The last few days have been really fun with some smaller waves, now excited for tomorrow as it's supposed to pick up quite big - woohoo! :D :D : @bradprosser  Responser: Cute you have matching posts!
