Definition: In this task, you're given a short article. Your job is to classify the article based on its category. Use the following classification labels, 0. World, 1. Sports, 2. Business, 3. Science or Technical. Label the text "0" if it contains information related to world. Label the text "1" if it contains information related to sports. Label the text "2" if it contains information related business. Label the text "3" if it contains science or technical related information. 
Input: AT T Wireless Opens Up Mobile Phone Music Store (Reuters) Reuters - AT T Wireless is launching its mMode Music Store on Tuesday, marking the first time U.S. consumers can discover, sample and purchase music using their appropriately sophisticated mobile phone.
