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: Rebels kill 17 Iraqis working for US army GUERRILLAS shot dead 17 Iraqis working for US forces north of Baghdad yesterday, and killed six other people, including three Iraqi National Guard members, taking the toll from three days of violence to more than 70.

World