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: Head of Delta #39;s Song steps down SAN FRANCISCO (CBS.MW) -- John Selvaggio, the architect behind Delta Air Lines #39; Song, has stepped down 22 months after the low-fare unit #39;s launch, according to company memos issued Friday.

Business