What is <Sandbox-Item> of <1> ?
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What is the sandbox-item for one?
SELECT DISTINCT ?j WHERE { ?j property:Sandbox-Item resource:1 }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P369> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q199>. }
select distinct ?answer where { ?answer wdt:P369 wd:Q199}