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: Appleby Takes Halfway Lead in Sun City  SUN CITY, South Africa (Reuters) - Australia's Stuart  Appleby carded a second round 69 to move to five-under par 139  and a one-stroke lead at the Sun City Golf Challenge on Friday.

Sports