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: Athletics: Montgomery and Gaines doping cases postponed LAUSANNE, Switzerland : Doping cases of world 100m record holder Tim Montgomery and Chryste Gaines have been postponed, the Court of Arbitration for Sport (CAS) said.
