Question: When did the historical country Portugal have 5,400,000 inhabitants?
Choices: 2011-07-01
2012-06-01
2006-04-01
2011-02-13
1974
2014-08-28
2004-02-08
1910
1850-01-01
2000-09-06
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "historical country" . ?e <country> ?e_1 . ?e_1 <pred:name> "Portugal" .  ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "5400000"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <point_in_time> ?qpv .  }
Program:
function: Find
inputs: Portugal
function: Relate
dependencies: 0
inputs: country
backward
function: FilterConcept
dependencies: 1
inputs: historical country
function: QueryAttrQualifier
dependencies: 2
inputs: population
5400000
point in time
Answer: 1910