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: China mine blast kills 33 Thirty-three workers have been killed after a gas explosion at a coal mine in China #39;s northern Shanxi province. Officials say 71 miners were in the shaft when the blast occurred at Nanlou township.

World