Question: Since when does Bucharest serve as the capital for Wallachia (the one that use Romanian as the official language) ?
Choices: 2013-10-01
1992-03-23
1991-09-05
1998-08-31
1815
1659-01-01
1884
1984-10-09
1986
1964-01-21
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Wallachia" . ?e_1 <official_language> ?e_3 . ?e_3 <pred:name> "Romanian" . ?e_2 <pred:name> "Bucharest" . ?e_1 <capital> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <capital> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Romanian
function: Relate
dependencies: 0
inputs: official language
backward
function: Find
inputs: Wallachia
function: And
dependencies: 1
2
function: Find
inputs: Bucharest
function: QueryRelationQualifier
dependencies: 3
4
inputs: capital
start time
Answer: 1659-01-01