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: Lowell Folk Festival began in 1990, after the city hosted the National Folk Festival for 3 consecutive years #3DThursday  Responser: We were there today, were you? 27th year in a row..
