Question: When was the association football club whose headquarter location is Varna founded?
Choices:
1947-09-18
1983
1950-01-01
2004-02-04
1932-03-18
1686
1936-01-23
1743
1854-12-29
1913-03-03
Answer: 1913-03-03
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "association football club" . ?e <headquarters_location> ?e_1 . ?e_1 <pred:name> "Varna" .  ?e <inception> ?pv .  }
Program:
function: Find
inputs: Varna
function: Relate
dependencies: 0
inputs: headquarters location
backward
function: FilterConcept
dependencies: 1
inputs: association football club
function: QueryAttr
dependencies: 2
inputs: inception