Question: When did Madrid become the twinned administrative body of Lisbon, which is the twin of Budapest?
Choices: 1979-05-31
1508-01-01
1994-04-19
1920-05-01
1979-06-03
1856-01-01
2012-06-22
1930-05-10
1973-11-26
1999-09-23
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Madrid" . ?e_2 <pred:name> "Lisbon" . ?e_2 <twinned_administrative_body> ?e_3 . ?e_3 <pred:name> "Budapest" . ?e_1 <twinned_administrative_body> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <twinned_administrative_body> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Madrid
function: Find
inputs: Budapest
function: Relate
dependencies: 1
inputs: twinned administrative body
backward
function: Find
inputs: Lisbon
function: And
dependencies: 2
3
function: QueryRelationQualifier
dependencies: 0
4
inputs: twinned administrative body
start time
Answer: 1979-05-31