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: Three U.N. Hostages Freed Unharmed in Afghanistan  KABUL (Reuters) - Three foreign U.N. workers held hostage  in Afghanistan were freed unharmed on Tuesday, almost four  weeks after their abduction at gunpoint on a Kabul street  raised fears of a wave of Iraq-style kidnappings.

World