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: I had the best Hip Hop dance lesson at Star Factory. AWESOME! The instructor....is in Los Angeles at a call back for "So you can dance, Crew!"  Responser: Mico...come with me on Thursday. It's only $10 and so much fun.
