what is the {end time} for {Union of South Africa} has {official language} as {English} ?
When did the Union of South Africa no longer have English as an official language?
SELECT ?value WHERE { wd:Q193619 p:P37 ?s . ?s ps:P37 wd:Q1860 . ?s pq:P582 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q193619> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P37> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q1860> .
?statement <http://www.wikidata.org/entity/P582> ?value. 
} 

When did the Union of South Africa never again have English as an official language?