. The data is described in the following relation schemas: Airport (airportID, name, city) Passenger (ticketNo, name, nationality, flightNo, seatNo) FK: flightNo references Flight (flightNo) FK: seatNo references Seat (seatNo) Flight (flightNo, flightCompany, departAirport, arrivalAirport) FK: departAirport references Airport (airportID) FK: arrivalAirport references Airport (

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