Question: When did Hangzhou become the twinned administrative body of Dresden (the one whose population is 3100)?
Choices: 1966-09-28
2009-01-01
1978-09-19
1997
2006-05-05
2017-07-12
1945-11-09
2010-05-15
1968-09-19
1971
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Hangzhou" . ?e_2 <pred:name> "Dresden" . ?e_2 <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "3100"^^xsd:double . ?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: Hangzhou
function: Find
inputs: Dresden
function: FilterNum
dependencies: 1
inputs: population
3100
=
function: QueryRelationQualifier
dependencies: 0
2
inputs: twinned administrative body
start time
Answer: 2009-01-01