Question: What association football club is headquartered in Sunderland?
Choices:
Brisbane Roar FC
Boca Juniors
Middlesbrough F.C.
Sunderland A.F.C.
Aarhus Gymnastikforening
Stevenage F.C.
Stade Brestois 29
Crawley Town F.C.
Steel Azin F.C.
Zamalek SC
Answer: Sunderland A.F.C.
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "association football club" . ?e <headquarters_location> ?e_1 . ?e_1 <pred:name> "Sunderland" .   }
Program:
function: Find
inputs: Sunderland
function: Relate
dependencies: 0
inputs: headquarters location
backward
function: FilterConcept
dependencies: 1
inputs: association football club
function: What
dependencies: 2