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: NBA sues to keep Pacers bans out of arbitration The NBA filed a federal suit Friday in an effort to block an arbitrator from hearing an appeal of the suspensions handed out to four members of the Indiana Pacers for fighting with fans 

Sports