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: As America celebrates its 237th birthday, we must remember all the blessings this nation has given us. Happy 4th of July!  Responser: Happy Fourth of July to you and Family
