Question: Which association football club is headquartered in the city whose official website is http://www.varna.bg/?
Choices: Leyton Orient F.C.
PFC Lokomotiv Plovdiv
Cagliari Calcio
FC Bayern Munich
Sheffield Wednesday F.C.
Club Deportivo Guadalajara
Esporte Clube Bahia
PFC Cherno More Varna
Adelaide United Football Club
Feyenoord
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "association football club" . ?e <headquarters_location> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "city" . ?e_1 <official_website> ?pv . ?pv <pred:value> "http://www.varna.bg/" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: official website
http://www.varna.bg/
function: FilterConcept
dependencies: 1
inputs: city
function: Relate
dependencies: 2
inputs: headquarters location
backward
function: FilterConcept
dependencies: 3
inputs: association football club
function: What
dependencies: 4
Answer: PFC Cherno More Varna