Question: Sydney Airport is the hub of which business?
Choices: KLM
Westfield Group
Delta Air Lines
Qantas
United Airlines
American Airlines
easyJet
Ryanair
Starbucks
Goldman Sachs
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "business" . ?e <airline_hub> ?e_1 . ?e_1 <pred:name> "Sydney Airport" .   }
Program:
function: Find
inputs: Sydney Airport
function: Relate
dependencies: 0
inputs: airline hub
backward
function: FilterConcept
dependencies: 1
inputs: business
function: What
dependencies: 2
Answer: Qantas