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: Cingular signs for 3G Cingular, the largest mobile operator in the US, has signed Ericsson, Lucent and Siemens to build a 3G network. Beginning next year the telco will build networks in  quot;a number of major urban and suburban markets quot;.

Business