Question: When did Cologne become the twinned administrative body of Istanbul whose local dialing code is +90 216?
Choices:
1940-11-25
1993-04-28
1997
2001-10-10
1859-02-14
1859-07-12
1954-01-01
1992-08-27
1992-10-20
1945-11-14
Program:
function: Find
inputs: Cologne
function: Find
inputs: Istanbul
function: FilterStr
dependencies: 1
inputs: local dialing code
+90 216
function: QueryRelationQualifier
dependencies: 0
2
inputs: twinned administrative body
start time
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Cologne" . ?e_2 <pred:name> "Istanbul" . ?e_2 <local_dialing_code> ?pv . ?pv <pred:value> "+90 216" . ?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 .  }
Answer: 1997