What is <OSM tag or key> of <castle> ?
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Which is the OSM tag or key for castle?
SELECT DISTINCT ?j WHERE { resource:castle property:OpenStreetMap_tag_or_key ?j }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q23413> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1282> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q23413 wdt:P1282 ?answer}
Tag:historic=castle