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: Arms dealer says Thatcher wanted to buy two military helicopters An arms dealer, who is the key state witness in the attempted coup in an oil-rich African state, said that he had talks with Sir Mark Thatcher who wanted to buy two military helicopters, it was revealed yesterday.

World