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: U.S. Tanks Move Toward Najaf Shrine, Clashes Kill 40  NAJAF, Iraq (Reuters) - U.S. tanks rumbled to within 800  meters (yards) of a holy shrine in the Iraqi city of Najaf on  Sunday as fierce clashes with Shi'ite rebels in a nearby town  killed at least 40 Iraqis, officials said.
