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: Iran Tells Russia to Expand Nuclear Ties Iran told nuclear partner Russia on Wednesday it would have to show  quot;readiness quot; to expand nuclear ties with Tehran to secure a solid share of Iran #39;s atomic market in face of growing competition from Europe.

World