Question: How was the population of the city that held the 2010 Toronto International Film Festival with population 261560 determined?
Choices: administrative division valid at the moment of publication
United Kingdom Census 2011
United Kingdom Census 1981
United Kingdom Census 1971
census
Pensky–Martens closed-cup test
Russian Empire Census
middle
Canada 2011 Census
estimation process
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city" . ?e_1 <location> ?e . ?e_1 <pred:name> "2010 Toronto International Film Festival" .  ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "2615060"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <determination_method> ?qpv .  }
Program:
function: Find
inputs: 2010 Toronto International Film Festival
function: Relate
dependencies: 0
inputs: location
forward
function: FilterConcept
dependencies: 1
inputs: city
function: QueryAttrQualifier
dependencies: 2
inputs: population
2615060
determination method
Answer: census