Refer to the input text as context and select the correct relationship between 'Qantas' and 'Alan Joyce' from the available options.
Options: headquarters location, subsidiary, founded by, chief executive officer

Chief executive Alan Joyce said the airline's operations at Sydney Airport had faced an uncertain future after that date, including possibly being shifted to Terminal 2, which currently houses rival Virgin Australia, Qantas subsidiary Jetstar and a number of smaller regional operators.
chief executive officer