what is the {point in time} for {Dalian} has {population} as {4480000} ?
When did Dalian have a population of 4480000?
When was the population of Dalian 4480000?
SELECT ?d WHERE { ?k property:point_in_time ?d . ?k property:population ?f . FILTER ( ?f = 4480000 ) . resource:Dalian property:population ?k }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q74881> .
?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> <4480000> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q74881 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '4480000')) . ?s pq:P585 ?value}