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 Threatens to Expel Two UK Aid Agency Heads  KHARTOUM, Sudan (Reuters) - Sudan asked the country heads  of two British aid agencies to leave the country, accusing them  of breaching Sudanese law and interfering in domestic affairs,  government and aid officials said Monday.

World