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: Expert: Writing Best for Contacting Aliens Sept. 3, 2004 - Writing, rather than phoning, is probably the best way to contact aliens, US scientists say. So instead of phoning home, it could have been more energy efficient if ET had inscribed information 

Sci/Tech