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: Thanks to everyone who voted for me yesterday and those who supported me throughout the campaign. I have 200,000 new friends across Massachusetts. -SFL  Responser: We are old friends, you didn't know you had
