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: Ex-Viacom president gets hired by Sirius NEW YORK -- Mel Karmazin, former president of media conglomerate Viacom Inc. , is joining Sirius Satellite Radio Inc. as chief executive, replacing Joseph Clayton, who is staying on as chairman, the company said yesterday.

Business