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: Karzai Rival Refuses to Concede Election KABUL, Afghanistan - Hamid Karzai's rivals said Sunday it was too early to call Afghanistan's inaugural presidential election, despite the interim leader's dominant showing after three days of vote-counting.    The U.S.-backed incumbent's main challenger, Yunus Qanooni, insisted that a full count and a proper investigation by a panel of foreign experts on fraud allegations could yet put him in the running...
