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: Hunting for vintage glasses.... @laurabyrnes has got me thinking. Tomorrow we #pinupgirls will lunch.  Responser: How about a vintage coke bottle for the mini-bar?
