User:Alicia Fagerving (WMSE)/Sandbox

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PREFIX wb: <https://metabase.wikibase.cloud/entity/>
PREFIX wbt: <https://metabase.wikibase.cloud/prop/direct/>
SELECT ?item ?itemLabel ?when
WHERE
{
?item wbt:P17 wb:Q22660.
OPTIONAL {?item wbt:P23 ?when}
SERVICE wikibase:label { bd:serviceParam wikibase:language "en,es,sv". }
}
ORDER BY ?when

Try it!