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: Spotted: THE CITY in New York City!  Responser: I was approved to review it through NetGalley then they archived it before I downloaded it. Time to check my library...so bummed...
