Question: Which low-cost airline is headquartered in Sydney?
Sentence (from "Sydney Airport"): Sydney (Kingsford Smith) Airport (colloquially Mascot Airport, Kingsford Smith Airport, or Sydney Airport; IATA: SYD, ICAO: YSSY ; ) is an international airport in Sydney, Australia located 8 km (5 mi) south of Sydney city centre, in the suburb of Mascot.
Relevant evidence: Yes