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: US airlines agree to cut flights at Chicago #39;s O #39;Hare CHICAGO, Aug 18 (Reuters) - US airlines have agreed to limit flights into Chicago #39;s O #39;Hare International Airport at peak periods to stem record delays that have slowed aviation nationwide, federal officials said on Wednesday. 
