hub_airports (airport)

literal strings: hub airports

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• hub_airports is an airport     
• hub_airports is a generalization of sfo (airport)     
• hub_airports is a generalization of frankfurt_main (transportation)     

categories

• airport(100.0%)
• Seed

relations

• airportsuchasairport
• sfo (100.0%)
• Seed
• SEAL @632 (100.0%) on 10-sep-2012 [ 1 2 3 4 ] using (hub_airports, sfo)
• frankfurt_main (100.0%)
• SEAL @622 (100.0%) on 07-aug-2012 [ 1 2 3 4 ] using (hub_airports, frankfurt_international_airport)
• Seed