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: #BREAKING: Mexican president cancels meeting w/ President Donald J. Trump  Responser: Who care about Mexicos president. He is fake. Mexico has a wall on their southern border
