On the major airlines operating long-haul services out of Sydney and Melbourne, economy seat width ranges from 43 centimetres to the 48.25 centimetres on Singapore Airlines Boeing 777‑300ER, Airbus A380 and A330-300 flights.
Utilize the input text as a context reference, choose the right relationship between 'Airbus A380' and 'Singapore Airlines' from the options.
Options: original broadcaster, operator, creator, subsidiary