Question: When did Cairo (the one that is the twinned administrative body of Ottawa) become the twinned administrative body of Frankfurt?
Choices: 1887-06-03
1985-07-16
1924-11-01
1979-10-25
2012-09-28
1991-09-17
1899-10-11
2006-01-12
1807-01-19
1806
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Cairo" . ?e_1 <twinned_administrative_body> ?e_3 . ?e_3 <pred:name> "Ottawa" . ?e_2 <pred:name> "Frankfurt" . ?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: Ottawa
function: Relate
dependencies: 0
inputs: twinned administrative body
backward
function: Find
inputs: Cairo
function: And
dependencies: 1
2
function: Find
inputs: Frankfurt
function: QueryRelationQualifier
dependencies: 3
4
inputs: twinned administrative body
start time
Answer: 1979-10-25