What is {population} of {Taipei} that is {determination method} is {family register} ?
What is the total of families registered in Taipei?
How many families are registered in Taipei?
SELECT ?w WHERE { ?e property:determination_method resource:Family_register . ?e property:population ?w . resource:Taipei property:population ?e }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1867> .
?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> ?obj .
?statement <http://www.wikidata.org/entity/P459> <http://wikidata.dbpedia.org/resource/Q485228>
} 

SELECT ?obj WHERE { wd:Q1867 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P459 wd:Q485228 }