what is the {point in time} for {Birgit Nilsson} has {award received} as {Léonie Sonning Music Prize} ?
Name the date Birgit Nilsson received the award of Leonie Sonning Music Prize.
when did Birgit Nilsson received the award of Leonie Sonning Music Prize?
SELECT ?c WHERE { ?i property:award_received resource:Léonie_Sonning_Music_Prize . resource:Birgit_Nilsson property:award_received ?i . ?i property:point_in_time ?c }
select distinct ?value  where {
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?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P166> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q1165751> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q233951 p:P166 ?s . ?s ps:P166 wd:Q1165751 . ?s pq:P585 ?value}