Question: Which is the aircraft family that it is operated by Qantas?
Paraphrase: Which is the air ship family that it is worked by Qantas?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q32491 wdt:P121 ?obj . ?obj wdt:P31 wd:Q15056993 } 
Answer: Boeing 747-400, Airbus A380, Boeing 737, Boeing 767, Airbus A330