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: Sudan: Darfur Rebels Use Human Shields  KHARTOUM, Sudan (Reuters) - Sudan's security chief said on  Monday rebels in the western region of Darfur have drawn army  fire and aerial bombardment on to Darfur villages by using them  as cover and as bases for military operations.

World