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: Security on high alert as Afghans go to poll KABUL (Afghanistan) - Polling has started in Afghanistan #39;s first-ever direct presidential election on Saturday, with interim leader Hamid Karzai widely favoured against more than a dozen rivals while 100,000 troops were on high alert for expected violence 
