washington_national__dca_ (airport)

literal strings: Washington National (DCA)

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• washington_national__dca_ is an airport     
• non_hub_airports is a generalization of washington_national__dca_ (airport)     

categories

• airport(100.0%)
• Seed

relations

• inversoofairportsuchasairport
• non_hub_airports (100.0%)
• Seed