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: Ground Zero Workers File Billion-Dollar Health Lawsuit Nearly three years to the day of the 9/11 terrorist attacks, lawyers for more than 800 "Ground Zero" rescue and clean-up workers announced Monday a billion-dollar class-action lawsuit against owners of the World Trade Center for exposing the workers to allegedly toxic conditions.

Sci/Tech