Question: What's the official name of the association football club headquartered in Linz?
Choices:
Lincoln
Accrington Stanley Football Club
City of Hamilton
Barnet Football Club
Императорский Петроградский университет
Lefkoşa
Linzer Athletik-Sport-Klub
York
Leicester
Екатеринослав
Answer: Linzer Athletik-Sport-Klub
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> "Linz" .  ?e <official_name> ?pv .  }
Program:
function: Find
inputs: Linz
function: Relate
dependencies: 0
inputs: headquarters location
backward
function: FilterConcept
dependencies: 1
inputs: association football club
function: QueryAttr
dependencies: 2
inputs: official name