Question: South African Airways has a low-cost partier that is based at which airport?
Sentence (from "South African Airways"): The airline flies to 56 destinations worldwide, in partnership with SA Express, SA Airlink and its low-cost carrier, Mango, within South Africa and across the continent, and eight intercontinental routes from its Johannesburg hub at OR Tambo International Airport, using a fleet of 54 aircraft.
Relevant evidence: Yes