Question: What organization has its headquarters in Warsaw?
Choices:
Royal Australian Air Force
Legia Warsaw
The McClatchy Company
Village Roadshow Pictures
Orange
Interactive Advertising Bureau
McDonald's
NBCUniversal
Academy of Television Arts & Sciences
Lions Gate Entertainment
Answer: Interactive Advertising Bureau
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "organization" . ?e <headquarters_location> ?e_1 . ?e_1 <pred:name> "Warsaw" .   }
Program:
function: Find
inputs: Warsaw
function: Relate
dependencies: 0
inputs: headquarters location
backward
function: FilterConcept
dependencies: 1
inputs: organization
function: What
dependencies: 2