what is the {point in time} for {São Paulo} has {population} as {4.50949e+07} ?
When did the population of Sao Paulo reach 4.50949e+07?
When did Sāo Paulo have a population of 4.50949e+07?
SELECT ?q WHERE { FILTER ( ?u = 4.50949e+07 ) . resource:São_Paulo property:population ?k . ?k property:point_in_time ?q . ?k property:population ?u }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q175> .
?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> <4.50949e+07> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q175 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '4.50949e+07')) . ?s pq:P585 ?value}