Question: What method determines that 509468 is the population of the Pennsylvania county that contains West Chester?
Choices: gross floor area
Pensky–Martens closed-cup test
estimation process
Census
United Kingdom Census 2011
United Kingdom Census 1981
Canada 2011 Census
United Kingdom Census 2001
average
middle
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "county of Pennsylvania" . ?e_1 <located_in_the_administrative_territorial_entity> ?e . ?e_1 <pred:name> "West Chester" .  ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "509468"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <determination_method> ?qpv .  }
Program:
function: Find
inputs: West Chester
function: Relate
dependencies: 0
inputs: located in the administrative territorial entity
forward
function: FilterConcept
dependencies: 1
inputs: county of Pennsylvania
function: QueryAttrQualifier
dependencies: 2
inputs: population
509468
determination method
Answer: estimation process