Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Els maintains two-shot lead at WGC-American Express Ernie Els was up to the challenge against one European Ryder Cup hero Saturday but will have to fend off three more of them in the final round of the WGC-American Express Championship.

Sports