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: Heading to St Louis this weekend Happy valentines Day  Responser: Okay enjoy. What do you have against San Diego??? When you get back from cruising... I'm coming to L.A.!

Negative