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: Today is the first day of school in the Downey Unified School District! I hope students, teachers, and staff enjoy a year full of wonder and discovery. #DowneyUnified #Downey #DUSD  Responser: Happy first day of school !!!!!!
