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: Conversion of uranium to continue, vows Iran VIENNA, Sept 21: Iran defied the United Nations on Tuesday by announcing it would go on converting a large amount of raw uranium to prepare it for enrichment, a process that can be used to develop atomic bombs.
