What is {named after} of {Vladikavkaz} that is {start time} is {1954-0-0} ?
What is named after Vladikavkaz since the year of 1954?
SELECT ?obj WHERE { wd:Q5239 p:P138 ?s . ?s ps:P138 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1954')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5239> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P138> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1954-0-0>
} 

In 1954, what was named after Vladikavkaz?