Question: How was the population of the city of the United States that is the twinned administrative body of Duisburg determined as 165221 ?
Choices: national estimation
administrative division valid at the time point of history to which the data relates
administrative division valid at the moment of publication
United Kingdom Census 1991
estimation
Address Based Population Registration System
census
Population registration in Sweden
hearth tax
rated voltage
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city of the United States" . ?e_1 <twinned_administrative_body> ?e . ?e_1 <pred:name> "Duisburg" .  ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "165521"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <determination_method> ?qpv .  }
Program:
function: Find
inputs: Duisburg
function: Relate
dependencies: 0
inputs: twinned administrative body
forward
function: FilterConcept
dependencies: 1
inputs: city of the United States
function: QueryAttrQualifier
dependencies: 2
inputs: population
165521
determination method
Answer: census