Question: What is the population of a city where Rockhampton Airport has direct flights to 
Sentence (from "Rockhampton Airport"): Rockhampton Airport ("Connor Park") (IATA: ROK, ICAO: YBRK) is a major Australian regional airport in West Rockhampton that services the city of Rockhampton, with direct flights to the cities of Brisbane, Townsville, Gold Coast and Mackay.
Relevant evidence: Yes