What is {officeholder} of {United Nations Secretary-General} that is {start time} is {1953-4-10} ?
On April 10, 1953, who became Secretary General (UN)?
Who became Secretary-General of the United Nations on 10th April 1953?
SELECT ?g WHERE { ?k property:officeholder ?g . FILTER ( CONTAINS ( YEAR ( ?v ) , '1953' ) ) . ?k property:start_time ?v . resource:Secretary-General_of_the_United_Nations property:officeholder ?k }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q81066> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1308> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1953-4-10>
} 

SELECT ?obj WHERE { wd:Q81066 p:P1308 ?s . ?s ps:P1308 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1953')) }