what is the {determination method} for {Badalona} has {population} as {217210.0} ?
Which was the way that it was determined that Badalona has a population of 217210?
How was it determined that Badalona has a population of 217210?
SELECT ?q WHERE { ?b property:determination_method ?q . FILTER ( ?z = 217210.0 ) . ?b property:population ?z . resource:Badalona property:population ?b }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q15468> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1082> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <217210.0> .
?statement <http://www.wikidata.org/entity/P459> ?value. 
} 

SELECT ?value WHERE { wd:Q15468 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '217210.0')) . ?s pq:P459 ?value}