What is {place of birth} of {Sergei Rachmaninoff} that is {country} is {Russian Empire} ?
Where in the Russian Empire was Sergei Rachmaninoff born?
Where was Sergei Rachmaninoff born in the Russian Empire?
SELECT ?u WHERE { ?m property:country resource:Russian_Empire . ?m property:place_of_birth ?u . resource:Sergei_Rachmaninoff property:place_of_birth ?m }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q131861> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P19> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P17> <http://wikidata.dbpedia.org/resource/Q34266>
} 

SELECT ?obj WHERE { wd:Q131861 p:P19 ?s . ?s ps:P19 ?obj . ?s pq:P17 wd:Q34266 }