Question: What big city's country is the Socialist Federal Republic of Yugoslavia until the ending date in 1991?
Choices: Utrecht
Skopje
Split
Lyon
Aachen
Fort Smith
Saint Petersburg
Zagreb
Stuttgart
Halle (Saale)
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "big city" . ?e <country> ?e_1 . ?e_1 <pred:name> "Socialist Federal Republic of Yugoslavia" .  [ <pred:fact_h> ?e ; <pred:fact_r> <country> ; <pred:fact_t> ?e_1 ] <end_time> ?qpv . ?qpv <pred:year> 1991 .  }
Program:
function: Find
inputs: Socialist Federal Republic of Yugoslavia
function: Relate
dependencies: 0
inputs: country
backward
function: QFilterYear
dependencies: 1
inputs: end time
1991
=
function: FilterConcept
dependencies: 2
inputs: big city
function: What
dependencies: 3
Answer: Split