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: We've already raised $450 toward our $4000 goal. Thank you to everyone who has donated! Can you donate $40 or even $4 right now to help us reach our goal?  Responser: Happy Birthday!!! You are living your life well!!! Best wishes for many more great years!
