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: Leaving Monaco in the morning heading to Birmingham, England to base before we head into the Olympic Village for Opening Ceremonies. We can't post pics while the Games are going on, but I'll be sure you post them AFTER the fact! Let's Go Team USA! <3  Responser: good luck dear,eagerly waiting for those pics.
