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: Colombia Rebels Kill 9 Officers in Ambush (AP) AP - Leftist rebels ambushed a police convoy Tuesday in northeastern Colombia, killing at least nine officers and wounding three others, authorities said. A 10th policeman was killed in a separate incident.
