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: Iraq's Sistani Arrives in Najaf; 74 Dead in Attacks  NAJAF, Iraq (Reuters) - Iraq's most revered cleric arrived  in Najaf Thursday to try to end a bloody three-week uprising as  tensions were inflamed by attacks on Shi'ite marchers that  killed at least 74 people and wounded 315.

World