Question: When did the  Union of South Africa stop using Afrikaans as the official language?
Choices:
1982-02-16
1977-01-20
1961-05-31
2016-09-01
1989-01-20
2009-05-15
1540
2009-12-07
1848
2002-02-24
Answer: 1961-05-31
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Union of South Africa" . ?e_2 <pred:name> "Afrikaans" . ?e_1 <official_language> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <official_language> ; <pred:fact_t> ?e_2 ] <end_time> ?qpv .  }
Program:
function: Find
inputs: Union of South Africa
function: Find
inputs: Afrikaans
function: QueryRelationQualifier
dependencies: 0
1
inputs: official language
end time