What is <DDB ID> of <German National Library> ?
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What is DDB ID for  German National Library ?
SELECT DISTINCT ?j WHERE { resource:German_National_Library property:DDB_ID ?j }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q27302> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4948> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q27302 wdt:P4948 ?answer}