Question: What method was used to determine that Czechoslovakia has a population of 13607385?
Choices: Sixth National Population Census of the People's Republic of China
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average
Pensky–Martens closed-cup test
questionnaire
Census
census
administrative division valid at the time point of history to which the data relates
middle
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SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Czechoslovakia" . ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "13607385"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <determination_method> ?qpv .  }
Program:
function: Find
inputs: Czechoslovakia
function: QueryAttrQualifier
dependencies: 0
inputs: population
13607385
determination method
Answer: census