Question: When did the city on the Eurasian continent have a population in the amount of 490571?
Choices:
1957-11-25
2005-05-01
2005-02-16
1990-12-31
2006-02-15
2010-01-01
2005-06-01
1815-12-01
2003-09-24
1800
Program:
function: Find
inputs: Eurasia
function: Relate
dependencies: 0
inputs: continent
backward
function: FilterConcept
dependencies: 1
inputs: city
function: QueryAttrQualifier
dependencies: 2
inputs: population
490571
point in time
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city" . ?e <continent> ?e_1 . ?e_1 <pred:name> "Eurasia" .  ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "490571"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <point_in_time> ?qpv .  }
Answer: 1990-12-31