What is {instance of} of {Yekaterinburg} that is {start time} is {1923-11-3} ?
Name the event that begun on 3.11.1923 in Yekaterinburg.
What started in 1923-11-3 in Yekaterinburg?
SELECT ?i WHERE { ?z rdf:type ?i . ?z property:start_time ?k . resource:Yekaterinburg rdf:type ?z . FILTER ( CONTAINS ( YEAR ( ?k ) , '1923' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q887> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P31> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1923-11-3>
} 

SELECT ?obj WHERE { wd:Q887 p:P31 ?s . ?s ps:P31 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1923')) }